B7 In-Ear Wireless Bluetooth Earphones HD Noise Reduction Gaming Sports Earphone 1. Ergonomic design, in-ear comfortable to wear 2. Bluetooth 5.3 chip, stable connection and fast transmission 3. Intelligent control, one-key operation more convenient 4. Movement does not fall, solid and reliable 5. HIFI non-destructive sound quality, restore the sense of hearing the scene 6. 360ACS panoramic sound effect, three-frequency balanced hierarchy 7. Sound and picture synchronization, low latency, better gaming experience Parameters: 1. Bluetooth version: 5.3 2. Audio decoding: AAC, MP4, M4A, WAV, AIF, AIFC 3. Communication distance: 10-15 meters 4. Earphone compartment battery capacity: 180mAh; earphone battery capacity: 25mAh 5. Speaker size: copper ring 13mm 6. Microphone sensitivity: -42D 7. Operating temperature: -40-80 degrees celsius 8. Frequency response: 20Hz-20KHz 9. Charging parameters: Type-C 5V1A 10. Size: earphone compartment 48 x 47 x 25mm; single earphone 30 x 18.5mm 11. Weight: 32g