Description: High Quality ChipMini twin in-ear headset with high quality chip for best stereo sound and superb bass sound. Clear high & low volume, make you enjoying the music true wirelessly. 50mAh + 450mAhBuilt-in 50mAh lithium battery and come with 450mAh intelligent charging box provides 3-4 times charges for continuous use, make you enjoy music or watching TV & films for a longer time, more convenient to carry & charge when you mountaineering, hiking, biking or other outdoor sports. Easy To UseWith voice notification of incoming calls and phone numbers. With easy to use buttons allows /play/pause on all your music tracks as well as all phone calls without reaching your phone; super quick pairing with your mobile phone. V4.1 + EDRLarger Bluetooth range make the mini headphones extraordinary, up to 30ft Bluetooth range in open space, you can share it with people around you. Comfortable DesignOptimized for extra comfort and fit better in ear, ease the problem of popping out, soft material to protect ears, make your phone call and music time more comfortable. Sweat-proof construction is perfect for sports, running, jogging & gym exercise, watching TV, or sleep. Specification: Power Bank Box Size: 80x60x30mm Headset Size: 28x20x28mm Bluetooth Version: Bluetooth 4.1 (CSR)+ EDR; Class 2 Frequency Response Range: 21Hz-18KHz Operation Range: Up to 10 meters Impedance: 16 Sensitivity: 95dB Degree of distortion: 1% SNR: 95 Headset Battery: 50mAh Power Bank Box Battery: 450mAh Charge Time (for Power Bank Box): About 2hours Music Playing Time: About 2-3 hours Talk Time: About 2-4 hours Package Includes: 1 Set Headset 1 Piece Charging Box 1 Piece USB Cable 1 Pair Earplugs 1 Piece User Manual