Product Name: Bluetooth 6.0 Adapter Frequency Range: 2.4GHz (2402-2480MHz) Transmission Distance: 20M (Open, Unobstructed) Rated Voltage: DC 5V/50mA (Maximum) Interface Type: USB Transmission Rate: 3.0Mbps Operating/Storage Temperature: -5C to 55C/-10C to 65C Operating/Storage Humidity: 40% to 60%/30% to 75% : For 7/8.1/10/11 Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Color: Black Material: ABS Package Contents: 1 x Wireless Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.