Features: bluetooth V5.3 chip - The latest buetooth 5.3 technology help bluetooth headphones to bring faster wireless pairing and more stable connection, lower power consumption, and Compatible with your i - OS and Android bluetooth-ready devices. Binaural Stereo Sound - Adopt new upgrade technology , Binaural Stereo to create a layered listening experience Provide you with shocking sound quality and create surging sound effects. Effective Noise Cancelling - Wearable on side, close to the ear, effective noise reduction. Smart Touch Control - Smart touch, one-key open quick operation. Mini Portable - Mini compact, delicate sound quality, enjoy sleep time. Specifications:Model:Sleep - Buds Z2Color:Black/White - Wearing Type:In-ear - Impedance:16ΩFrequency Response:20Hz-20k - Hzbluetooth Version:V5.3Supported Profiles:HFP/HSP/A2DP/AVRCPTransmitting Distance:10m - Battery Capacity:Headset: 30mAhCharging box: 230mAhCall Time:5h - Music Time:5h - Standby Time:130h - Charging Time:1.5hMicrophone:YesTouch Control:Yes - Volume Control:Yes - Noise Cancelling:Yes - Product Weight:0.0390kg - Package Weight:0.1080kg - Product Size:63×45.3×28.5mm - Package Size105×120×35mm Package list2× Earphones1× Charging Case1× Cable1× User Manual