Parameters:1.Bluetooth Transmission Range: 10 Meters2.Rechargeable Battery Capacity: 300 Mah3.Headphone Battery Capacity: 40 Mah4.Working Time: About 2-5 hours5.Charging Time: About 1-2 hours6.Standby Time: About 150 hours7.Material: Plastics8.Waterproof Rating: IPX49.Operation Mode: Buttons10.Compatible: Android, iOS, Microsoft, Tablet, 99% of the phones with Bluetooth.Features:1. Full Frequency HIFI Moving Iron2. Real-Time Power Display, Power Level At A Glance3. The Left And Right Ears Can Be Used Separately And Can Be Independently Matched With Bluetooth Devices4. Smart Buttons Design, Easy To Operate5. Bluetooth 5.0, Low Power ConsumptionNote:When purchasing the tws Bluetooth headset, please read the following instructions: Due to long-term transportation, the power of the tws earphone will be exhausted. You will not be able to use the headset when you receive the package. It may be powered off. The first thing to do is to charge the headset box for 30 minutes. Very important. Thank you!This product does not have a retail package box! ! ! Packing List:1*Bluetooth Headset(L)1*Bluetooth Headset(R)1*charging box1*data cable1*manual