Description:4.0 Smart Chip, efficient Transmission Speed.compact, Ultra Light Design Stereo Bluetooth Headset, Portable and Easy to Carry.high-fidelity Sound Quality, Wireless Songs Enjoy voice Report Number, Low Power Remind, connect/disconnect Remind, boot Off Prompts. allows You to Conveniently Answer Calls While Driving. supports Two Mobile Phones Simultaneously Connected. long Battery Life, Fast Charging. support Wechat, Qq Voice Calls,movie,compatible for Almost All the Mobile Phones and Tablet Pc, Etc.specification:drive: 40 M impedance: 32 Ohmbluetooth Version: Bluetooth V4.0 Edrpower Level: Class Iioutput Power: 30mwbluetooth Distance: 10 Meters Carrier frequency Response: 20-20000 Hz operating Voltage Range: 3.0v-4.2vmicrophone Sensitivity: -42dbwith A2dp / Avrcp High-quality Stereo Audio Transmission and Remote Control Protocolpowerful Noise Noise Cancellation Circuit (Active Noise Reduction)wired and Bluetooth Automatically Switch to Support Audio Input charging Time Is About 1 Hour (Power Indicator Charging: Blue Light Lights, Fully Charged: Blue Light Goes Out)dimensions: Diameter Length 20mm. Width 15mm. 18mm Hightalk Time About 4 Hours music for About 3 Hours Standby Time Is About 3-4 Discharging Power: Dc5v Power Interface [the Hole] (Computer USB Port, Mobile Phone Charger, Car Charger)compatible: Compatible With Android, Apple, Microsoft, Symbian 99% of With Bluetooth Cell Phones(Ios Cell Phone Has Power Display)color: Black.