Material: Plastic System Requirements: Compatible with Bluetooth 4.1/4.2/5.0 devices: When the computer is Windows 8/8.1/10/11 system Color: Black Features: Maximum transmission distance: about 20m/65.62ft. Transmission rate: 10 (Mbps) Working frequency: 2400 (MHz) Size: about 2.3*1.45*0.53cm/0.91*0.57*0.21in
