SPECIFICATIONS:* Bluetooth: Version: 5.0 Range:10 m* Driver: 10 mm* Impedance: 32 O* Sensitivity:100dB +/- 5 dB * Frequency:20 Hz - 20 kHz* Playtime:3 - 4 Hours* Charge Input: 5 V DC, 0.1 A* Charging Time: 2 Hours* Battery: 60mAhADDITIONAL FEATURES:* Lightweight Design* Includes Cable Adjuster and Clip* True Stereo SoundINCLUDED IN THE PACK:* Amplify Blues 2.0 Earphones* Micro USB Charging Cable* Instruction Manual* Cable Length Adjuster & Clip