Specifications:Using bluetooth-compatible V5.1 chip and having stable performance, high transmission, low power consumption and strong compatibility.Featuring 10m connection distance makes it super convenient and practical for you to use.Having ergonomic design so it is more comfortable for you to wear in daily life.Binaural split design can separate one ear, which is equivalent to two independent bluetooth-compatible headsets.Comes with strong compatibility so it can fit most types of mobilephone.With button control design makes it simple and stylish.Item Name: bluetooth-compatible HeadphonesType: 3 Digital Display, 1 Digital Display(Optional)Bluetooth Version: 5.1Space Print Version: CVC 8.0Frequency Range: 2402MHz-2480MHzTransmission Distance: 10mCharging Input Voltage and Current: 5VBattery: Built-in Battery(Included)Mobile Phone Main Battery Capacity: 50mAhRechargeable Battery Capacity: 2000mAhFeatures: bluetooth-compatible 5.1, Wireless, Fine WorkmanshipSize Details:Bluetooth Headphone Size: 2.85cm x 1.7cm x 3cm/1.12" x 0.67" x 1.18" (Approx.)Charging Box Size: 8.2cm x 4.8cm x 3cm/3.23" x 1.89" x 1.18" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x bluetooth-compatible Headphones1 x Charging Box1 x User Manual1 x Charging Cable