Havit E9 Semi-in-ear ENC Noise Reduction Wireless Bluetooth Earphones Features: 1. HiFi-level original sound quality, creating a three-dimensional surround atmosphere 2. ENC call noise reduction, clear calls even outdoors 3. 10mm small cavity, smaller, lighter and more comfortable 4. Curved arc, no pain or loss when attached to the ear 5. Bluetooth 5.4, stable transmission, lower power consumption 6. Pebble feel, small 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. Product size: earphones 30.5 x 16.7mm, charging case 51.1 x 46.8mm 11. Weight: about 32.8g 12. This product is measured manually, and there may be an error of 0.1-0.2mm and 0.1-0.2g in length and weight; there may be a slight color difference due to display and light problems. Please refer to the actual product! 13. Note: The shipment only includes headphones, not other items in the picture!