Function: LCD Display: The new LCD display can display searched Bluetooth devices Transmitter Receiver 3-In-1: Bluetooth transmission mode (TX): Convert wired audio into Bluetooth signal, and transmit it to Bluetooth device for output. Bluetooth Receive Mode (RX): Receive Bluetooth signal and transmit it to wired audio through Bluetooth connection. FM function: for those cars which don't support 3.5mm Jack output Bluetooth 5.0: With Bluetooth 5.0 chip installed, USB Bluetooth adapter has a better performance than the previous version in terms of wider transmission distance, faster data rate, and lower power consumption. The portable adapter that can be used as a transmitter or receiver at the same time. In transmitter mode, convert TV, PC, CD player, iPod, MP3 / MP4 into a Bluetooth transmitter. Receiver mode: ideal for sound systems transmitting music at home or in the vehicle. Specification: Model number: K6 Bluetooth: V5.0 Transmission Distance: 15m Battery: Built-in Rechargeable Li-polymer battery(300mAh) Working Time: 6 Hours (depend on audio volume) Charging: Micro USB 5V Audio Port: 3.5mm Color: Black/White Package includes: 1 X Bluetooth Transmitter & Receiver 1 X 3.5MM Audio Cable 1 X USB Charging Cable 1 X User Manual