Features: 1. HD Calls+ CSR8633 Chipset-- Noise cancellation Mic blocks out disruptive background noise like wind, traffic or crowds, suitable for various environment speaking. 2. Smart Touching Control-- One multi-function button to answer, reject, hang-up, redial, mute of calling, active Siri/ Voice assistant to achieve hands-free. Convenient for safe driving, business working. 3. Multi-points connection-- Can connect to two devices at the same time. Easy pair with tablets, iOS, Android cell phones and other bluetooth devices within 33 feet. 4. Lightweight-- Equipped with durable soft rubber soft earbuds and 180° adjustable and detachable ear-hook, ergonomic design make stable and comfortable wearing for left or right ear. 5. Up to 80 hours long standby time, up to 6 hours of calling, up to 5 hours of playing music, only 1 hours to charging full, which overcome the difficulty of battery shortage during the business trip,driving,meeting,traveling. Specifications: Specification Brand BlitzWolf Model BW-BH1 Color Black Wearing Type In-ear Net Weight (g) 5.6g Dimensions 5.6*1.1*0.6cm Technical Parameters Microphone Yes bluetooth Version V4.1+ EDR Transmission Distance 10m bluetooth Profiles A2DP AVRCP Headset Headsfree Input Voltage DC5.0V Waterproof IPX4 Frequency Response 2402.0-2480.5MHz Battery Capacity 80mAh, 3.7V Charging Time 1h Call Time 6h Playback Time 5h Standby Time 80h Charging Input 70MA-1A Certifications FCC, CE, RoHS Package Included: 1* BlitzWolf BW-BH1 Wireless bluetooth Earphone 1* USB Charging Cable 2* Eartips 1* Earhook 1* Manual