Specification: Item Type: Bluetooth Receiver Transmitter_x000D_Material: ABS_x000D_Bluetooth Version: V5.2_x000D_Bluetooth Protocol: RX: A2DP AVRCP; TX: A2DP_x000D_Battery Capacity: 500mAh Lithium Battery (included)_x000D_Operating Time: RX>35H; TX>25H_x000D_Charging Time: 3 Hours_x000D_Charging Power: DC 5V_x000D_Sound Codecs: _x000D_TX: AptX Adaptive, AptX HD, AptX LL, AptX, SBC _x000D_RX: AptX Adaptive, AptX HD, AptX, AAC, SBC Features: 12 IN 1: In TX mode, Bluetooth transmitter plugs into non Bluetooth devices such as TV, MP3, player, PC via AUX, RCA jacks and transmits sound to Bluetooth headphones, Bluetooth speakers; in RX mode, Bluetooth receiver can connect to wired speakers, car sound input port, home theater receiver and receive sound from smartphone via Bluetooth. 2APTX: Bluetooth 5.0 with built in CSR chip, supports Aptx, Aptx LL, extremely low latency, minimizes voice delay, so you can enjoy perfect synchronization and CD like sound. APTX low latency Bluetooth sound codec provides HiFi and low latency sound. 3STABLE CONNECTION: Bluetooth adapter supports 230ft long Bluetooth transmission distance, transmission range all over the room, powerful sound; you can hear it upstairs, downstairs, kitchen, garage, balcony and even backyard. 4DUAL PAIRING MODE: In TX mode, you can connect two Bluetooth speakers or Bluetooth headphones at the same time, both speakers or headphones can sound at the same time; in RX mode, you can connect two Bluetooth?enabled cell phones at the same time. 5RECHARGEABLE: 3 hours charging time. Fully charged for 8 hours of continuous use. Support charging at work, no need to worry about the power, you can plug it into the power supply for power supply at work, this mode can avoid the trouble of frequent charging. PackageList: 1 x BluetoothReceiverTransmitter 1 x InstructionManual 1 x ChargingCable 1 x 3.5MMSoundCable 1 x RCASoundCable