Material:ABS; Size: 8.9*4.7*2.7cm;Weight：0.135kg;Bluetooth version :5.3;Impedance: 400 Ohm;Headphone sensitivity: -38dbv/pa;Power supply type: USB-C;Charging voltage: 5V;Charging box charging time: 2H;Model name: YYK-880;Transmission range : 15 m; Running time: 7-8 hours; Charging time: 0.5-1.5 hours; Standby time: 6 days; Headset battery capacity: 50 mAh; Charging compartment battery capacity: 500 mAh;This ear clip wireless Bluetooth earbuds angle is comfortable and ergonomically designed for great comfort and stability. The ear clip wireless Bluetooth will not cause your ears to feel swollen and painful when you wear it for a long time. The ear clip design of the bone guide earphone is novel, comfortable to wear, painless and can be used regardless of the size of the ear.Bluetooth 5.3 chip+improved battery, low power consumption and long battery life, you can record TV programs and enjoy games. The bone conduction headset can be used for up to 6 hours on a single full charge of Bluetooth.It is comfortable, safe for travel and training. Easy to use by simple touch to listen to music or calls. Open the cover for pairing and wear universal Bluetooth that corresponds to different devices.Bluetooth chip of Bluetooth 5.3 version without earplugs bone conduction headphones is used, with stable signal, low standby power consumption and better performance.