【PREMIUM 4.0 STEREO DRIVERS】 Adopted advanced Bluetooth 4.0 technology. The two high-end drivers crank out powerful, thumping bass, prominent mids and truly sparkling highs. The driver units measure in at Ø40mm and feature an impressive frequency range of 20hz-20khz.
【16 HOURS MUSIC PLAY TIME/18 HOURS TALK TIME】40-mm drivers,105dB Sensitivity and built-in HD microphone deliver rich, deep bass and stream crystal clear sound while listening to music and making phone calls
【STAY COMFORTABLE】The Memory-protein ear cushion simulate human skin texture, ensuring lasting comfort. The stainless steel slider(Adjustable Size:2cm-5cm) and softly padded headband allows you to find the perfect fit without constraint and provide excellent durability.
【WIRELESS & WIRED MODE】 the wireless mode----With a built-in 290mAh battery which provides 16 hours' continuous wireless music play time and let you get rid of the tangled cables on the move; the wired mode----Used as a wired headphone with an audio cable.
【NOTE】Depending on your head/ear size/shape, this headphones may be a little tight(feels like 'on-ear') for someone which is designed to avoid sound leakage.In case of that and to get both audio and wearing comfort, please take off the headphone every 1-2 hrs to get your ears relax and protect them from lasting muggy environment in use.

Specifications:
Bluetooth Version: V4.0
Bluetooth Solution: CSR
Communication:Wireless+Wired
With Microphone:Yes
Volume Control:Yes
Support Agreement: A2DP, AVRCP, HFP, HSP
Operating Distance: 10M
Sensitivity:105dB
Frequency Response Range:20-20000Hz
Rechargable Battery :290mAh

Charging time: about 3 hours
Music Playtime:up to 16hours (50% volume)
Talk Time:up to 18hours (50% volume)

Package Include
1 x Collection Case
1 x 3.5mm Audio Cable
1 x Bluetooth Headphones
1 x USB Charge Cable
1 x English User Manual​