Product description:Gram weight: 56gMaterial: ABS + siliconeColor red whiteBluetooth: 4.2Transmission frequency: 2.4 GHz (2.402-2.480 GHz)Transmission Distance: 10MSpeaker sensitivity: 120 5dBFrequency response: 20-20kHzPlaying time: approx. 6-8hCharging time: approx. 1.5 hoursPackage includes:1 * wireless mini headphonesDescription:Smart One to Two The headset can connect two phones or other mobile devices at the same time, meeting the needs of modern people for entertainment and wireless calling.No in-ear design The innovation is the design of ear hooks. The wearing method is to hang it by your ear, not wearing pressure, and it can be worn on either side.Ergonomic design The earbuds are attached to the ear buckles, and the ears are stressed evenly, making it more comfortable to wear, HD sound quality, HD calling. Bluetooth 4.2, voice announcement function.Slim and Lightweight Take off the weight of a traditional bluetooth headset, wear it without feeling anything, make your ears very easy.