1. Bluetooth version: V5.32. Bluetooth protocol: A2DP, AVRCP, HFP3. Effective distance: about 10m4. Power supply: lithium battery included5. Operating time: about 7h ( earphone ) + 21h ( charging case )6. Input: 5V 200mA ( earphone ) / 5V 1A ( charging box )7. Frequency range: 20Hz-20KHz8. Sensitivity (SPL): about 94dB9. Packing list: charging case x 1, earphones x 2, storage bag x 1, charging cable x 1, manual x 1Features:1. Charger with OLED screen, icons show connection, power and other status, clear and concise2. 13mm composite diaphragm moving coil unit, strong resolution, the rich details of the music is truly reproduced, low, medium and high three-frequency balance3. 65ms low-latency mode, sound and picture synchronization.4. Bluetooth 5.3 module technology, anti-interference, low power consumption, fast and stable transmission5. The earphone can listen to songs for 7 hours with a single full, with the charging compartment with up to 7 + 21 hours of battery life, support for fast charging6. Equipped with intelligent call noise reduction algorithms, intelligent reduction of environmental noise, to retain a clear human voice7. IP54 level dustproof and waterproof, no need to be afraid of daily rain and sports8. U-shaped half-ear curve, firmly fit the ear canal, stable and uniform force, long wearing comfort9. Bluetooth one-key connection, no master-slave restrictions, single and dual senseless switching experience10. Easy to operate with a touch of a button11. Through Edifier Connect, you can freely define various functions of the headset, and the APP provides four different EQ modes for switching.Specification: Package Weight One Package Weight 0.20kgs / 0.45lb One Package Size 12cm * 8cm * 4cm / 4.72inch * 3.15inch * 1.57inch Qty per Carton 140 Carton Weight 29.00kgs / 63.93lb Carton Size 50cm * 38cm * 34cm / 19.69inch * 14.96inch * 13.39inch Loading Container 20GP: 412 cartons * 140 pcs = 57680 pcs 40HQ: 958 cartons * 140 pcs = 134120 pcs