This UGREEN 3.5mm wireless Bluetooth adapter provides TX and RX mode and can be used as a transmitter or receiver. This Aux Bluetooth adapter helps to turn the non-Bluetooth devices into Bluetooth-enabled, such as TVs, PCs, car stereos./P> Bluetooth Version: 5.0 Stable Signal Connection: With Bluetooth 5.0 technology, UGREEN Bluetooth transmitter and receiver reduce signal transmission delay and provide solid signal connection Long Endurance Power: When fully charged you can use it up to eight hours on TX mode, and 5.5 hours on RX mode Input: 3.5mm Transmit Range: Up to 10mm/33ft Bluetooth protocol: A2DP/AVRCP/HFP Codec: RX Mode: SBC, AAC TX Mode: SBC Multipoint Connection: Two Point Connection Frequency Domain: 2.402GHz-2.480GHz Frequency Response: 20Hz-20kHz Signal To Noise Ratio: +90db *Transmitter and Receiver functions cannot be used simultaneously* Battery Capacity: 140 mAh 3.7V (518 mWh) USB-C Port for power supply (5V)