4-in-1 Bluetooth Remote Microphone Transmitter which can be used as the wireless Remote Microphone, Bluetooth Transmitter (TX),Bluetooth Receiver (RX) and Bluetooth Stereo Headset. Bluetooth: V4.1 Class II. Working distance: 10 m. Bluetooth profiles: handsfree, A2DP/AVRCP. Wireless remote microphone for two-way communication. TV transmitter to improve your TV hearing experience. Audio receiver to add wireless connectivity to existing audio system. Bluetooth stereo headset for wireless phone calls and music streaming. Deliver the HD audio in perfect synchronization. RX multipoint connection: supports dual connection with two mobile phones when Bluetooth receiver mode. Transmitter working time: up to 6 hours. Receiver working time: up to 6 hours. Standby time: up to 100 hours. Can be charged and used at the same time. with the universal microUSB charging contact. Package included: 1 x HearLink, 1 x 3,5 mm stereo earphones, 3 x sports in-ear hooks, 1 x 3,5 mm audio cable, 3 x RCA cable, 1 x micro USB cable, manual. Dimensions: 20 x 12,6 x 57,5 mm. Weight: 11 g. Colour: Black