Features: brand new and high quality Long-distance transmission: The USB Bluetooth-compatible adapter Using Realtek original chip RTL8761B, equipped with original factory drivers, conforming to Bluetooth-compatible 5.0 technical specifications, ultra-long transmission distance of 10-20m, dual-mode low-power transmission. High Transmission rate: The transmission rate is more stable, and the transmission rate is 3Mbps, which can support the high-speed transmission of files and audio materials. Hanging Hole Design: At the end of the mini bluetooth-compatible adapter pc, there is a hole for packing, you can put it with your keys in your pocket, bags, Cosmetic bag, briefcase, laptop bag and so on. Wide Compatibility: This Bluetooth-compatible adapter for pc is fully backward for Bluetooth-compatible 2.0, Bluetooth-compatible 2.1, Bluetooth-compatible 3.0 specifications, universal USB2.0 3.0 interface and micro form factor, making it easy to carry. Support many system: Support mainstream operating system for Windows 10/8/7 (except for Mac OS/for RT/Linux). Specifications: Product name: RTL87B1B Bluetooth-compatible standard: 5.0 Length: approx. 3cm/1.18in Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1PC x Bluetooth-compatible 5.0 Receiver Transmitter