Abstract: A portable container includes a triangular prism shaped transparent case comprising an open bottom and three structural elements each extending downward from one of three angles of its top to an intermediate position of one of three longitudinal edges of the case; a handle secured to the top of the case; a triangular bottom member fitted onto the bottom of the case; and a shelf comprising an inclined top for dividing an internal space of the case into an upper space and a lower space, a side surface, and a continuous projecting edge extending downward from two edges of its top and extending toward one of the three longitudinal edges of the case. The shelf is secured between bottom ends of the structural elements and the bottom member.

Abstract: A wireless earphone (e.g., a Bluetooth earphone) is disclosed that includes a housing having a first hole and a second hole, a unidirectional microphone disposed rearward of the first hole; an omnidirectional microphone disposed rearward of the unidirectional microphone and under the second hole, and a mounting assembly in the housing for fastening the omnidirectional and unidirectional microphones. The earphone can substantially block out external noise and greatly reduce echo.

Abstract: A method of connecting a Bluetooth headphone to Bluetooth communications devices includes paring; initializing the Bluetooth headphone comprising creating a table having a first column of rfcomm channel associated with the Bluetooth communications device and a second column of instance corresponding to the rfcomm channel, setting a HS or HF mode of Bluetooth, and causing the Bluetooth headphone to be ready; and connection establishment which, in one embodiment, is initiated by one Bluetooth communications device by checking data, establishing an instance associated with one Bluetooth communications device, establishing a corresponding rfcomm channel, filling the rfcomm channel and the instance in the table, and establishing a connection of one Bluetooth communications device and the Bluetooth headphone.