Havit E9 Semi-In-Ear ENC Noise Reduction Wireless Bluetooth Earphones Features: 1. Standard version with cavity resonance sound absorption structure + dual-channel low latency technology 2. Ultimate version with 360-degree panoramic stereo sound effect + digital sound enhancement technology 3. HiFi-level original sound quality, creating a three-dimensional surround atmosphere 4. ENC call noise reduction, clear calls even outdoors 5. 10mm small cavity, smaller, lighter and more comfortable 6. Curved surface, no pain or fall off when attached to the ear 7. Bluetooth 5.4, stable transmission, lower power consumption 8. Pebble feel, compact and portable Product parameters: 1. Material: ABS+PC 2. Bluetooth version: 5.4 3. Communication distance: about 10 meters 4. Decoding protocol: SBC 5. Frequency response range: 20Hz-20KHz 6. Charging interface: Type-CUSB-C 7. Battery capacity: 300mAh 8. Charging time: about 1.5 hours 9. Listening time: about 6 hours 10. Battery life: Standard version - about 20 hours of combined battery life, flagship version - about 25 hours of combined battery life 11. Product size: earphones 30.5 x 16.7mm, charging case 51.1 x 46.8mm 12. Weight: about 32.8g 13. This product is manually measured, and there may be an error of 0.1-0.2 mm and 0.1-0.2 g in length and weight; there may be a slight color difference due to display and light problems. Please refer to the actual product 14. Note: The shipment only includes earphones, not other items in the picture