Abstract: The presently disclosed subject matter aims to provide a wearable electronic device charging unit configured to be fastened onto a wearable electronic device strap attached to a wearable electronic device case, the wearable electronic device charging unit comprising: a power source; and, at least one attaching element coupled to the power source configured to attach the power source onto the wearable electronic device strap; wherein the power source is configured to be in an electrical communication with a rechargeable battery located within the wearable electronic device case so as to recharge the rechargeable battery without interfering with the operation of one or more power-consuming components located on the wearable electronic device case.

Abstract: The presently disclosed subject matter aims to provide a wearable electronic device charging unit configured to be fastened onto a wearable electronic device strap attached to a wearable electronic device case, the wearable electronic device charging unit comprising: a power source; and, at least one attaching element coupled to the power source configured to attach the power source onto the wearable electronic device strap; wherein the power source is configured to be in an electrical communication with a rechargeable battery located within the wearable electronic device case so as to recharge the rechargeable battery without interfering with the operation of one or more power-consuming components located on the wearable electronic device case.

Abstract: A system for detecting structural damage to a rigid structure, the system comprising: at least one impact generator capable of applying a one-time impact on the structure; an acoustic sensor; a vibration sensor; and a processing circuitry configured to: provide an indication of the structural damage to the rigid structure upon (a) a first deviation above a first threshold between an expected acoustic wave profile, expected to radiate from the structure, absent the structural damage, and an actual acoustic wave profile being measured by the acoustic sensor in response to an application of the one-time impact, or (b) a second deviation above a second threshold between an expected to vibration profile of expected vibrations of the structure, absent the structural damage, and an actual vibration profile in response to the application.

Abstract: A system, device and method are provided to enable low energy firearm shot measurement, including, in some embodiments, an impact sensor adapted to detect a substantial impact event from the firearm, and to generate an analog signal representing the impact event; an electronic circuit supporting a microprocessor to enable processing of digital data representing the analog signal, the electronic circuit also supporting a memory unit to store the data, the microprocessor and the memory being designed to be substantially in a sleep state except for a selected time interval related to the impact event following an identification of the impact event from the firearm; an amplifier, adapted to amplify the analog signals and transmit the signals to the circuit; a power source to support the circuit supported components; and a communications module for enabling communicating of the digital data to an external data receiver, upon demand.

Abstract: A system, device and method are provided to enable low energy firearm shot measurement, including, in some embodiments, an impact sensor adapted to detect a substantial impact event from the firearm, and to generate an analog signal representing the impact event; an electronic circuit supporting a microprocessor to enable processing of digital data representing the analog signal, the electronic circuit also supporting a memory unit to store the data, the microprocessor and the memory being designed to be substantially in a sleep state except for a selected time interval related to the impact event following an identification of the impact event from the firearm; an amplifier, adapted to amplify the analog signals and transmit the signals to the circuit; a power source to support the circuit supported components; and a communications module for enabling communicating of the digital data to an external data receiver, upon demand.