Features:Upgraded BT5.3 chip provides stable and connection, low consumption, strong anti-interference ability.Adopt 10mm graphene diaphragm, overall three-frequency equalization, more delicate details, HiFi sound quality.Game/music dual-mode, low latency, easy to switch according to your needs.Dual-channel connection, stable signal transmission, support single/binaural mode.Ergonomic semi-in-ear design, the Headphone fits ear canal, not easy to drop, comfortable to wear.Intelligent environmental noise reduction, built-in high sensitive microphone to realize clear calls.Widely compatible with most BT-enabled devices, such as mobile phone, tablet, laptop, etc.Specification:Model: GM2 ProColor: Black/White(optional)BT version: V5.3Transmission distance: 10m(barrier-free)Speaker size: 10mmFrequency response range: 2.402-2.480KHzSpeaker impedance: 32Ω±15%Microphone sensitivity: -42dB±3dBSignal to noise ratio: 90dBDistortion degree: 5%port: Type-CBattery capacity: 40mAh(single Headphone), 350mAh( case)Packing list:1 * Pair of Headphone1 * case1 * cable2 * Pairs of earplugs1 * User manual