Specifications:BT Version: 5.0Transmitting Distance: 10m/33ftFrequency Range: 40-20KHzSensitivity: 1063dBImpedance: 32ΩCharging Case Battery Capacity: 3.7V 300mAhEarbuds Battery Capacity (Each): 3.7V 50mAhMusic Play Time: about 3 hours (depends on music volume)Charging Time: about 2 hoursColor: RedItem Weight: 7.3g/0.25oz (Pair)Package Size: 12.2*8.0*3.3cm/4.80*3.14*1.30inPackage Weight: 62g/2.18oz   Features:True wireless design, left and right earphone channels are separated. It can be used solely or used in pairs.BT 5.0 ensures high data transfer speed, stable and fast connection, and low power consumption.Lightweight and mini size fit well to your ear canal, comfortable to wear.Built-in Mic on both earbuds delivers clearer and more real talking sound in stereo mode.Sweatproof, no worry about splashing water and sweat, enjoy music and sports freely.A charging case can charge and store the earbuds. With digital display, the remaining power can be shown.Supports touch control. Easy to control music and call.