Sentry Bluetooth Wireless Headphone with Mic

Rechargeable. Noise-isolation. Play controls. Compatible with most mobile & audio devices. Compatible with iPhone, Android, tablets. Listen to music or make voice calls wirelessly with any Bluetooth enabled audio device from up to 30 ft away without messy cables. Put your music on hold & make crystal clear calls wirelessly from your phone or talk on the internet using a tablet or laptop. Long-life lithium-ion battery recharges using your phone’s charger, laptop, computer & the included USB cable. Built-in remote control enables you to answer voice calls, play or pause your music wirelessly without using your phone. Driver: 40MM; Frequency: 20HZ-20KHZ; Impedance: 32 +/-2; Sensitivity: 102DB +/-3DB; Power: 20MW; Mic Sensitivity: -38+/-4DB; Playback: up to 4 hours; Range: 30FT/10M; Battery: 3.7V 200MAH; Battery Type: LI-ION; USB Cable: included; Bluetooth: V5.0. Actual playback times may vary. Battery performance may be affected by multiple factors including but not limited to ambient temperature, listening volume, and/or distance from source audio device.