1. Bluetooth version: 5.1 2. Transmission distance: about 15 meters (under barrier-free conditions) 3. Interface: 3.5mm audio interface 4. Frequency response range: 10Hz-20HKz 5. Signal to noise ratio: less than 110dB 6. Transmission rate: 3Mbps 7. Function: send and receive 2 in 1 8. Battery capacity: 140mAh 9. Weight: about 49 grams 10. Size: about 6x2 cm
