Features: Bluetooth-compatible 5.3 USB adapter, low latency, no lag, stable transmission, low power consumption, and high efficiency. Insert and play, compatible for multiple system, such as Win7/8.1/10/11(drive free), Linux system. Built in antenna to enhancing signal, 20 meter obstacle free long-distance transmission, more stable signal. Small size and easy to carry, enjoy the convenience of wireless connection, whether it is for travel, home or work. Supports simultaneous connection of multiple bluetooth-compatible devices, widely used in headphones, audional system, speaker, printers, mouse keyboards, game controllers, mobile computers, and more. Specifications: Material: ABS Size: Approx. 3x1.6x0.71cm/1.18x0.63x0.28inch Name: BT5.3 USB Adapter Bluetooth-compatible Version: BLE5.3(Compatibility with 2.0/4.0/5.0/5.1/5.2) Frequency Range: 2.4GHz (2402-2480MHz) Rate Voltage: DC5V Interfaces Type: USB Transmission Distance: 0-20meters Transmission Rate: up to 3.0Mbps Note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution. Package includes: 1x Bluetooth-compatible USB Adapter