【Special/small design】 Semi-ear earphone with waterdrop design, comfortable to wear. Easy to carry, can enjoy music anytime, anywhere. 【BT 5.0 and waterproof】 BT 5.0 HD lossless transmission, enjoy the game with low delay (BT 5.0) IPX45 waterproof can effectively prevent rain, fog, and sweat erosion, etc. 【Automatically match】 Power on immediately after taken out of the charging case. The first time to connect will enter automatic pairing and Will automatically connect afterward next time. 【Display state】 Master-slave switching technology, the left, and right are the main ears, very fast switching (master-slave switching). Connected state: the white light on the headset will flash three times. Power on: white light on for one second. Pairing status: red and white lights flashing 【LED display】 LED light design and double LED display for battery, the power display is easy to know. Can be charged anytime and anywhere according to the power display. 【Excellent comfort】 Using 6mm speaker, 3D bass effect, HIFI sound effect (HIFI sound effect). Designed according to the contours of human ears, it is tightly integrated with the ears, causing no sense of its existence Earphone battery capacity: 40mAh Charging bin capacity: 450mAh Playtime: 4 hours Talk time: 3.5 hours Charging time: about 1.5 hours Standby time: about 120H The charging time of earbuds by charging bin: 3-4 times Charging case size: 65*44.8*29.5 Product material: ABS+PC Net weight: 45g