Beautiful pebble shape charging case, light and portable, can be easily put into your pocket Semi-in-ear design, the ergonomic design provides a comfortable, secure fit and effectively disperses pressure HiFi stereo sound echo in your ears, provides rich, balanced sound and crisp audio Upgrade Bluetooth-compatible 5.3, nearly zero latency, the connection is faster and more stable One-step pairing, supports the independent use of a single earphone Designed with charging LED indicator, the charging status is clearly visible Smart touch control at your fingertips Specification: Material: ABS+PC Headphone type: semi-in-ear Interface: Type-C Bluetooth-compatible version: 5.3 Product chip: JL6983D2 Frequency response range: 30Hz - 20KHz Charging time: about 1.5 hours for earphones and about 2 hours for charging box Bluetooth-compatible receiving distance: 10 meters (straight line distance) Standby time: 30 hours Listening/talking time: about 3-4 hours Battery capacity: Headphones 30mAh, Charging box 300mAh Compatible devices: Android, for Apple and other playback devices that support Bluetooth-compatible function Product size: 50.2*46mm Product weight: 33.5g Product certification: UN38.3, MSDS, drop test, sea shipping, air shipping Package included: 1 x Pair of Bluetooth-compatible Earphones 1 x Charging Case 1 x Type-C Charging Cable 1 x English and Chinese User Manual