If you have any question after you receive the item , please contact us first before opening dispute and leave a comment,much appreciate Parameters: ●Bluetooth version :Bluetooth 5.3 ●Sensitivity:96db + 3db ●Charging interface :TYPE-C ●Frequency response range:20HZ-20KHZ ●Impedance:32Q±15 % ●Ultra long standby:240 hours ●Charging times of charging compartment:4-6 times ●Single use time:6-8 hour ●Standby time:240 hour Feature: * IPX5 Waterproof and Dustproof * High Capacity Battery * HD Voice * HiFi Sound * LED Display * Low Delay Package Included: 1*Headset ======================================================================================= 【Large capacity charging compartment with longer battery life】 【Low Latency】 【Intelligent Noise Reduction Voice】 【IPX5 Waterproof/Sweatproof/Dustproof】 【One click button operation】 【Dual-host dual Bluetooth mode】