Features: brand new and high quality The latest Bluetooth-compatible 5.2 low latency technology; with 3D sound function Support dual stream (TX mode), support (qne transmitter connects two bluetooth-compatible speakers or headphones at the same for time) Support Bluetooth-compatible headset, audio, receiver phone TV and other equipment Support Multi-point connection (RX mode): support connecting two mobile phones Support one-to-two connection;Support handsfree(RX Mode) Specifications: Item: Audio Receiver Transmitter Combo Bluetooth-compatible Version: V5.2 Supporting Agreement: A2DP AVRCP Battery Type:250mAh Lithium Ion Polymer Battery Code:RX:aptX Adaptive/aptX-HD/aptX/AAC/SBC RX: Mobile phone, PAD, PC with Bluetooth-compatible function TX: Bluetooth-compatible speakers or headphones that support A2DP protocol can be connected to use Support hands-free calling function in RX mode Size: approx 4.8x4.8x1.2cm/1.89x1.89x0.47in Note: There might be a bit color distortions due to different computer resolutions. There might be size errors due to different computer resolutions. Package includes: 1PC x Audio Adapter 1PC x 3.5mm Aux Cable 1PC x Type-C Charging Cable 1PC x User Manual