Item Type: Bluetooth HeadsetMaterial: ABSBluetooth: 5.0Supported Modes: HSP, HFP, A2DP, AVRCPTransmission Distance: 10m / 33ftTalk Time: Up To 8 HoursMusic Time: Up To 8 HoursStandby Time: More Than 120 HoursCharging Time: 1 HourCharging: Micro USBCharging Voltage: DC5VSensitivity: 42db3 (at 1000Hz)Impedance: 3215%Frequency Range: 20Hz-20KHzBattery: 90mAh Li ion Battery (included)Package List1 x Bluetooth Headset2 x Earplugs1 x Charging Cable1 x Manual1Bluetooth 5.0 Technology: Bluetooth headset provides fast and stable pairing with any iOS and for Android smartphones, tablets, laptops, MP3 players, up to 33ft away. 2Clear Sound: Hands free earphones feature advanced built in HD mic to provide crystal clear and natural sound, allowing you to enjoy high quality music and clear calls anytime, anywhere. 3Function: Supports 1 for 2 connection of 2 devices, freely switch to listen to songs and make calls. Supports real time display of the remaining power of for iPhone, making it more worry free to replenish the power. 4Hands Free Call: Bluetooth headset with mic supports hands free calling and voice number notification for incoming calls. Voice alerts on battery level, connection status, and even announce the caller's phone number. 5Comfortable and Convenient: Designed to fit either ear, the retractable earhook and rotatable arm ensure a comfortable fit. It's lightweight and comfortable enough to wear for hours at a time. 6Long Battery Life: This bluetooth headset offers 8 hours of continuous talk, up to 120 hours of standby time, and requires only 1 hour of fast charging for reliable wireless calls throughout the day.