1. Bluetooth Version: Bluetooth V5.3
2. Bluetooth protocol: A2DP, AVRCP, HSP
3. Effective distance: about 10m
4. Power supply: lithium battery included
5. Use time: about 6.5h ( earphone ) + 19.5h ( charging case )
6. Input: 5V 200mA ( earphone ) / 5V 1A ( charging box )
7. Frequency range: 20Hz-20KHz
8. Sensitivity (SPL): about 94dB
9. Packing list: charging case x 1, earphones x 2, earbuds x 4, charging cable x 1

Features:
1. Lightweight and compact, comfortable to the ear
2. Master-slave switching, seamless connection
3. 0.06s low latency rate, audio and video synchronization
4. Bluetooth 5.3 chip, fast connection, stable signal
5. IP55 level dustproof and waterproof, easy to cope with sweaty sports/rainy day traveling
6. AI call noise reduction technology, accurately recognizes and separates environmental noise and human voice, removes noise interference, clear and stable call
7. Balanced tri-frequency, rich in detail, beautiful vocals, clear layers, natural and real
8. Connect with Edifier Connect APP, support rich customization settings