Compatible with all smartphones like iOS and Android Headphones 60mAh charging compartment battery 400mAh, Talk time 2-3 hours Main features: Built-in microphone, support in making mobile phones Calls With A2DP/AVRCP high-quality stereo audio transmission and remote control protocol Powerful denoising circuit, active noise reduction, enjoy clear music Can be used separately, save power or share music with a friend Built-in noise reduction circuit, active noise reduction, enjoy clear music Can be used separately, save power or share music with a friend Built-in Power indicator, red light off indicates that the headhen is fully charged Small and elegant appearance Technical data: Bluetooth version: Bluetooth V4.2 + EDR Bluetooth distance: 10 meters Frequency: 20 - 20000 Hz Operating voltage range: 3.7 V - 4.2 V Sensitivity: - 42 dB Battery capacity: 60mAh Charging time: about 1 hour Working time: one for 3 hours, a pair for 2 hours Standby time: one for 80 hours, a pair for 60 hours Supply:2 x Headphones1 x Charging cable1 x Silicone case1 x Operating instructions English