Product Details: 1.Product Name:K55 Business Bluetooth Earphone 2.Product Color:Black,Silver,Gold 3.Bluetooth Version:Bluetooth 5.2 4.Capacity of Earphoe:140mAh 5.Transmission Distance:10m 6.Music Time:About 20 Hours 7.Charging Time:About 20Mins 8.Calling Time:About 20 Hours Features: 1.Call vibration reminder function. 2.Chinese English tone switching . 3. Earphone power display. 4. Two mobile phones can be connected at the same time . 5. Charging time : less than 20 minutes . 6.Talk & Music time 20 hours . Packing List: 1 * K55 Wireless Earphone 1 * Charging Cable 1 * User Manual About us: Dear customers, we are a professional manufacturer of Bluetooth devices such as Bluetooth adapters, Bluetooth headsets, Bluetooth speakers, etc. We will test all products before