2 in 1 Fiber Optic Bluetooth 5.0 Audio ReceiverTransmitter An overview of the ■ bti-029 is a receivetransmit 2-in-1 stereo sound fiber bluetooth adapter, which can switch between receiving state (RX) or transmitting state (TX) by dial-mode switch. SPDIF: optical interface) choose audio interface or optical interface. Bti-029 supports one with two functions (when in TX state, two stereo bluetooth speakers or stereo bluetooth headsets can be connected at the same time, two speakersheadsets can produce sound at the same time; When in RX state, two phones can be connected at the same time. Currently, only one phone can make a sound, and which phone makes the sound first is the sound of which phone) ■ CSR BC8670 bluetooth chip is used as the core data processing, and the bluetooth version is V5.0 ■ transmitted power: ClassII, within 10 meters (actual range depends on the connected device) ■ frequency range: bluetooth standard, 2.402 ~ 2.480GHz ■ support bluetooth speaker or headset pair security key: 000011 1234 8888. ■ use time of receive state (AUX) about 15 hours ■ use time in launch state (AUX) about 15 hours ■ receive state service time (SPDIF) is about 12 hours ■ service time in launch state (SPDIF) is about 12 hours ■ charging time is about 2 hours. Charging input requirements: 5V DC ≥300MA ■ 350mAh rechargeable lithium-ion polymer battery ■ working temperature: -10 -- 55℃ ■ net weight: approx. 38.6g ■ size: 60*60*18.4mm