1. Material: Plastic; Size: 33 * 18 * 9.5mm; Weight: 4g2. Bluetooth version: 5.0 dual-mode; Solve the problem of computer not having Bluetooth function, support multiple device connections (speakers, headphones, keyboard and mouse, printers, etc.)3. System compatibility: Windows 7-8.1-10-11 and other operating systems4. Transmission distance: 0-10 meters; Transmission speed: 3Mbps
