1. Bluetooth version: V5.32. Bluetooth protocol: A2DP, AVRCP, HFP3. Effective distance: about 10m4. Power supply: lithium battery included5. Use time: about 7h+ 21h6. Input: 5V 200mA ( earphone ) / 5V 1A ( charging box )7. Frequency range: 20Hz-20KHz8. Sound pressure level: about 94dB9. Packing list: charging case x 1, earphones x 2, Type-C charging cable x 1, manual x 1Features:1. The upper shell of the charging compartment is made of high-gloss nano NCVM vacuum coating process, which refracts a delicate and soft luster on the light flow, and the same color splicing, simple and dynamic2. Space capsule charging case, more convenient and easy to take the earphone, open-type magnetic absorber3. U-shaped arc semi-in-ear structure, as light as nothing comfortable, smooth curve firmly fit the ear canal, effectively balancing the ear pressure4. Built-in 13mm PET diaphragm dynamic unit, strong resolution, rich sound details, low, mid and high frequency balance5. Backward inverted sound architecture, expanding the diaphragm triggered by air vibration amplitude frequency, bass details more full6. Bluetooth V5.3 chip module, stronger anti-interference, faster response time7. Game mode delay can be as low as 0.06s, sound and picture synchronization8. AI intelligent call noise reduction algorithm, significantly reduce the environmental noise, effectively improve the clarity of the callers voice9. After the headset is paired for the first time, it can be used again to connect back automatically, smart and fast10. Download Edifier Connect APP to unlock more useful functions, switch different EQ modes/earphone shutdown/real-time power check/control settings/location to find the earphone/Bluetooth settings11. Touch operation, simple and fast12. Master-slave switching, left and right ear can be used separately13. IP54 grade dustproof and waterproof, resisting sweat and rain splashSpecification: Package Weight One Package Weight 0.12kgs / 0.27lb One Package Size 12cm * 10cm * 4cm / 4.72inch * 3.94inch * 1.57inch Qty per Carton 100 Carton Weight 13.00kgs / 28.66lb Carton Size 50cm * 38cm * 32cm / 19.69inch * 14.96inch * 12.6inch Loading Container 20GP: 438 cartons * 100 pcs = 43800 pcs 40HQ: 1018 cartons * 100 pcs = 101800 pcs