Specification:Microphone: YesPrompt tone: EnglishBluetooth version: 5.2Angle diameter: 13mmCharging interface: TYPE-CPairing:Pick up automatic matchingEffective distance:10 meters (barrier-free)Bluetooth protocol:APD, AVRCP, HSP, HFPPerformance:TWS Bluetooth gaming headsetBattery capacity:40mah headset, charging compartment: 300 mahHeadphone usage time:3-4 hours (depending on the volume)Button function:switch up/down song,increase/decrease volume,answer/hang up call,call back,open cover linkPacking list:1 * One pair of Bluetooth headsets1 * Charging box1 * Charging cable1 * User Manual