【4 in 1 Bluetooth Transmitter】The Bluetooth transmitter receiver can be used as a Bluetooth transmitter and a Bluetooth receiver. In TX mode, the bluetooth adapter converts wired audio source to wireless audio for bluetooth speaker/etc bluetooth audio output. 【KTV singing, FM radio function】It has RCA and AUX input and output connections, and supports FM antenna, Bluetooth antenna and 6.5mm microphone interface. 【Low-Latency DSP Decoding】To avoid synchronization problems, the Bluetooth adapter is equipped with a Bluetooth 5.1 chip with DSP low-latency Bluetooth codec. 【Long battery life】The TV Bluetooth transmitter is equipped with a 1200mAh rechargeable battery, it only takes 1.5h to fully charge, and supports a maximum working time of 8 hours. 【Suitable for Men Gift for Father】Bluetooth audio transmitter supports pairing with 1 Bluetooth audio output (TX mode) at the same time, it can be used when you watch football games alone, or family KTV.