Abstract: This Application sets forth techniques for managing (e.g., tracking or detecting the presence or absence of) physical cards stored in a physical wallet. In particular, the techniques set forth a smart wallet configured to detect the physical cards stored therein, as well as a smart card configured to be inserted into a traditional wallet and to detect the physical cards stored therein. The smart wallet/smart card can be configured to, upon detecting a change to physical cards stored in the smart wallet/traditional wallet, gather information associated with the physical cards and store the information into a memory of the smart wallet/smart card. The smart wallet/smart card can, upon being communicably coupled to a wireless device, transmit the information to the wireless device. Subsequently, the wireless device can output a notification indicating any missing physical cards as well as provide remedial options.

Abstract: An electronic device such as a wearable electronic device may have a coil. The device may have a finger-ring housing that surrounds a finger-shaped opening to allow the device to be worn on a finger of a user. The coil may be formed from metal traces on a printed circuit that wrap around the finger-shaped opening. Near-field communications circuitry in the device may be used to gather near-field communications tag information. The tag information may be gathered in response to user input. Wireless communications circuitry that uses a non-near-field communications antenna may wirelessly transmit the tag information and/or other information such as user input to a companion device.

Abstract: An electronic device such as a wearable electronic device may have a coil. The device may have a finger-ring housing that surrounds a finger-shaped opening to allow the device to be worn on a finger of a user. The coil may be formed from metal traces on a printed circuit that wrap around the finger-shaped opening. Near-field communications circuitry in the device may be used to gather near-field communications tag information. The tag information may be gathered in response to user input. Wireless communications circuitry that uses a non-near-field communications antenna may wirelessly transmit the tag information and/or other information such as user input to a companion device.

Abstract: A system may include one or more processors and a host unit installed in a support structure of a building, the host unit including a communication module configured to send or receive communication data with at least one or more additional host units installed in the building, where the one or more processors are configured to measure an attribute of the sent or received communication data and detect a presence of an object based on a threshold change in the measured attribute of the sent or received communication data between the host unit and the one or more additional host units. The attribute can be an angle-of-signal (AoS) arrival of the communication between the host unit and each of the one or more additional host units, where the threshold change in the measured attribute is a threshold change in the measured AoS arrival.

Abstract: Ear buds are provided that communicate wirelessly with an electronic device. To determine the current status of the ear buds and thereby take suitable action in controlling the operation of the electronic device and ear buds, the ear buds may be provided with sensor circuitry. The sensor circuitry may include proximity sensors. The ear buds may each have a housing with a main body portion that is configured to be inserted into the ear of the user and an elongated stem portion that extends from the main body portion. The proximity sensors may include sensors on the main body and sensors on the stem. The proximity sensors may be light-based sensors that emit light that passes through the housing.

Abstract: Ear buds are provided that communicate wirelessly with an electronic device. To determine the current status of the ear buds and thereby take suitable action in controlling the operation of the electronic device and ear buds, the ear buds may be provided with sensor circuitry. The sensor circuitry may include proximity sensors. The ear buds may each have a housing with a main body portion that is configured to be inserted into the ear of the user and an elongated stem portion that extends from the main body portion. The proximity sensors may include sensors on the main body and sensors on the stem. The proximity sensors may be light-based sensors that emit light that passes through the housing.

Abstract: Wearable electronic devices, such as watches, can include a watch body and a band device that can be used together or independently of one another. The band device can provide continual operation of its functions even in the absence of the watch body. The assembly of the watch body and the band device can provide secure engagement, communication, and power sharing. Accordingly, neither the watch body nor the band device need to independently include components that provide every function that will be desired by the user. Instead, functions that are desired on a continual or long-term basis can be provided by the band device, and functions that are desired on an intermittent or short-term basis can be provided by the watch body.

Abstract: Ear buds are provided that communicate wirelessly with an electronic device. To determine the current status of the ear buds and thereby take suitable action in controlling the operation of the electronic device and ear buds, the ear buds may be provided with sensor circuitry. The sensor circuitry may include proximity sensors. The ear buds may each have a housing with a main body portion that is configured to be inserted into the ear of the user and an elongated stem portion that extends from the main body portion. The proximity sensors may include sensors on the main body and sensors on the stem. The proximity sensors may be light-based sensors that emit light that passes through the housing.

Abstract: Ear buds are provided that communicate wirelessly with an electronic device. To determine the current status of the ear buds and thereby take suitable action in controlling the operation of the electronic device and ear buds, the ear buds may be provided with sensor circuitry. The sensor circuitry may include proximity sensors. The ear buds may each have a housing with a main body portion that is configured to be inserted into the ear of the user and an elongated stem portion that extends from the main body portion. The proximity sensors may include sensors on the main body and sensors on the stem. The proximity sensors may be light-based sensors that emit light that passes through the housing.

Abstract: A system may include one or more processors and a host unit installed in a support structure of a building, the host unit including a communication module configured to send or receive communication data with at least one or more additional host units installed in the building, where the one or more processors are configured to measure an attribute of the sent or received communication data and detect a presence of an object based on a threshold change in the measured attribute of the sent or received communication data between the host unit and the one or more additional host units. The attribute can be an angle-of-signal (AoS) arrival of the communication between the host unit and each of the one or more additional host units, where the threshold change in the measured attribute is a threshold change in the measured AoS arrival.

Abstract: Ear buds are provided that communicate wirelessly with an electronic device. To determine the current status of the ear buds and thereby take suitable action in controlling the operation of the electronic device and ear buds, the ear buds may be provided with sensor circuitry. The sensor circuitry may include proximity sensors. The ear buds may each have a housing with a main body portion that is configured to be inserted into the ear of the user and an elongated stem portion that extends from the main body portion. The proximity sensors may include sensors on the main body and sensors on the stem. The proximity sensors may be light-based sensors that emit light that passes through the housing.

Abstract: Ear buds are provided that communicate wirelessly with an electronic device. To determine the current status of the ear buds and thereby take suitable action in controlling the operation of the electronic device and ear buds, the ear buds may be provided with sensor circuitry. The sensor circuitry may include proximity sensors. The ear buds may each have a housing with a main body portion that is configured to be inserted into the ear of the user and an elongated stem portion that extends from the main body portion. The proximity sensors may include sensors on the main body and sensors on the stem. The proximity sensors may be light-based sensors that emit light that passes through the housing.

Abstract: Ear buds are provided that communicate wirelessly with an electronic device. To determine the current status of the ear buds and thereby take suitable action in controlling the operation of the electronic device and ear buds, the ear buds may be provided with sensor circuitry. The sensor circuitry may include proximity sensors. The ear buds may each have a housing with a main body portion that is configured to be inserted into the ear of the user and an elongated stem portion that extends from the main body portion. The proximity sensors may include sensors on the main body and sensors on the stem. The proximity sensors may be light-based sensors that emit light that passes through the housing.