Features: brand new and high quality BT 5.0 chip: fast response, stable signal, fast operation, bid farewell to delay and lag. AVRCP control: support AVRCP control, you can perform "previous/next" and "pause/for play operations" on the PC player through the BT speaker/headset. High-definition call: support normal voice and high-definition voice during voice calls. It can support WeChat, QQ, skyp, etc. on the PC side, as well as a variety of conference software calls. Lossless sound quality: Lossless audio algorithm, restore more sound quality details, bring quality listening enjoyment. Signal enhancement: The built-in antenna enhances the signal to achieve 10 meters long distance transmission without obstacles, and the connection is stable and smooth. Specifications: Material: ABS Size: Approx. 32x16x8mm/1.25x0.62x0.31inch BT Version: 5.0 Input Voltage: for DC/5V Interface: USB Transmission Rate: 4Mbps Working Frequency: 2.4MHz Transmission Distance: 10m/393.7inch Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x BT Audio Transmitter