ZR900S Wireless Earbuds Features: <b>Ergonomic Design:</b></br> With in-ear design and soft silicone earhook, the earphone is really comfortable to wear for a long time and not easy to fall off. Soft earbuds offer you great wearing experience.<br> <b>Single or Double Mode:</b><br> In monaural mode, it allows you to share music with your lover. Or in binaural mode, you can enjoy stereo music and concentrate on your work.<br> Wireless BT V5.0 technology offers stable connectivity and less energy consumption. It is compatible with almost all BT-enabled devices and can transmit up to 10 meters.<br> <b>Hands-free Call:</b><br> Built-in microphone enables hands-free calls to set free your hands when doing sports. Buttons on the earphone to adjust volume, Play/Pause, the previous/next song, answer/reject number.<br> <b>Compact Charging Box:</b><br> The charging box has a compact size, easy to carry along. 3000mAh large capacity can charge the earbuds for about 9-10 times whenever and wherever possible.<br> <b>Specifications:</b><br> Product No: ZR900S<br> BT Version: V5.0<br> Transmission Range: 10M (without obstacles)<br> BT Protocol: HSP, HFP, A2DP, AVRCP,TWS, AAC<br> Frequency Response: 20Hz-20KHz<br> Impedance: 16Ω±15% 1kHz<br> Sensitivity: 90±3dB 1kHz/1mW<br> Speaker: 8MM, Titanium diaphragm<br> Input Voltage: DC 5V/1A<br> Dust & Waterproof: IPX5<br> Battery Capacity: Charging Box: 3000mAh; Earphone: 2*65mAh<br> Charging Time: About 1-2 Hours<br> Play Time: 8 Hours (medium volume)<br> Talk Time: 8+ Hours<br> Standby Time: 120 Hours<br> Material: Aluminum / ABS / Silica gel<br> Earphone Size: 2*1.2cm<br> Earphone Weight: 5g<br> Package Size: 7.98*4.86*3.55cm<br> Package Weight: 150g<br> Color: Silver<br><br> <b>Packing List:</b><br> 1 * Pairs of Earphones<br> 1 * Charging Bin<br> 1 * Charging Cable<br> 1 * User Manual (English)