[Bone conduction technology]: This bone conduction earphone adopts advanced bone conduction technology, which transmits audio through the cheekbones instead of air, avoiding the damage to the eardrum caused by long-term air conduction audio. Open-ear design for long wearing comfort [Comfortable to wear]: The sound passes through the bone conduction to say goodbye to the pain when wearing traditional earphones, effectively preventing otitis media, making it and more comfortable for the wearer to feel more comfortable and free to wear [16G Memory MP3]: This wireless earphone has built-in 16G memory, which can store about 4000 . When not connected to a mobile phone, no other accessories are required, and it can still be used as a convenient MP3 [Use version 5.0]: Compared with the lower version of wireless, the connection speed of version 5.0 is faster and the connection effect is more stable. Concurrent connections consume less power than before [APPLICABLE FOR MULTIPLE SCENES]: This IPX8 sweatproof and waterproof sports earphones are suitable for exercise, sports, running, swimming, cycling and daily use. Can also be used as a surprise family and friends Bluetooth Standard: Version 5.0 Supported audio formats: MP3, WMA, WAV, FLAC Memory capacity: 16GB Transmission range: 10 meters Mark sensitivity: -37dB Speaker impedance: 32 ohms Speaker power: 0.6~0.8W X2 Charging voltage: 5V (can be connected to a computer or mobile phone USB 5V charger for charging) Charging time: 2 hours (idle charge once a month) Battery capacity: 300MA Static standby power consumption: 7mA Local playback power consumption: 30~65mA Bluetooth playback power consumption: 25-65mA Playing time: 6-8 hours type: A Colour:black+red Material: ABS Package Contents: 1 x Headset 1 x Usb Cable Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.