Bluedio EH stereo Bluetooth headset is combined with latest technology, using colors and music to show your personality and release your soul. Combined with fashion design We believe that the headphones are a fashion accessory, so adding elements of fashion gem cutter button design, high-end coated UV, with the clip back of the headset, gently caught in the collar, that is something to make you love the accessories. 3 kinds of EQ to enjoy your world of music EH supports 3 kinds of EQmode(standard, treble, bass), press once the volume up and down button simultaneously when listening to music, you may switch to different EQ mode. Enjoy your music feast! Ultra-low-power BT4.0 technology The latest Bluetooth 4.0 technology provides up to 300 hours(12.5days) standby time and 5 hours music playtime for EH. Voice Command We know your hands are busy with other things, you may just need to say Yes or No to decide your call or not, providing the most humanized to help for your life. Multipoint pairing EH lets you connect two phones simultaneously, never miss any important calls, closely your life. Specifications: BT Version: 4.0 Bluetooth Protocol :A2DP、AVRCP、HSP、HFP RF Frequency Range: 2402 ~ 2480MHz（ISM BAND） Transmitting Power: Class2 Operating Distance: Up to 10m (free space) Talk Time: About 5hrs Bluetooth Music playtime: About 5hrs Standby Time: About 300hrs(12.5days) Charging Time: About 2hrs Frequency Response: 20-20kHz Sensitivity: 105dB Accessories: EH BT headset 1pc Headset cord 1pcUSB charging cable 1pc User"s manual 1pc