Product Name: Smart Bone Conduction Bluetooth Headset Model NO.: E-HS-A005 Distance version: Class B Specifications: HSP Color: 4colours Characteristics: Power Display Function: Bluetooth, USB Soundtrack: Dual Track Bluetooth Version: 4.0 Usage: Mobile Phone, Call Center, Computer Style: Headband Weight: 240g Transport Package: Cartoon Specification: 35*22*14mm Origin: China Product Description Unique Bone style Bone Conduction Headphones: The headsets use bone conduction technology, which are mini vibrations that travel through the cheekbones and go directly to the inner ear (cochlea), bypassing the eardrum completely. Wireless earbuds with hearing protection for you! Wonderful Exercise Companion: With the open-ear design, you're able to take in the music while hearing the sound of your feet hit the pavement and any warnings from bikes, cars and others who share your surroundings. This Bluetooth headset can avoid itchy ear, or ear wax build up, compared with in-ear design earphones.Cool to Use: With Bluetooth 4.0 , you can enjoy HiFi stereo music and clear calls. With 1 main button + 2 volume keys, the earbuds allow quick access to answer, pause, hang up incoming calls, adjust the volume or switch to the previous/ next song.Comfortable to Wear: The titanium alloy headband is lightweight and flexible to wear.Long Battery Life: After 2 hours of charging, it can last up to8hours music/talking time, 200 hours,standby time. Long enough for any of your favorite outdoor activities!