Power: ≤ 4 dBm, class 2
Effective range: 10M
Sensitivity: -84dBm / 0.1% BER
Frequency response: 20 Hz - 20 kHz
Speaker size: 40mm
Voltage: 3.7VDC (built-in 400MAH rechargeable battery)
Talking time 8~9 hour
Standby time 250hour
Charge time 2-2.5 hour
Operate temperature: -4 ~ +131°F (-20 ~ +55°C)
The Bluetooth and MP3 function of this headphone support stereo music playing, phone calling. It also supports all audio devices that have Bluetooth capability, such as, cell phone, tablet PC, laptop, computer, etc. The 3.5mm audio jack of this Bluetooth headphone provides a simple wired connection of a variety of devices without Bluetooth. Also Allows you to answer or reject phone calls anytime and anywhere. It can be charged via USB, rechargeable battery, convenient, and practical.
It has playing time up to 8-9 hours, and continue talk time up to 8 hours, standby time up to 250 hours. It has Good quality, foldable design, and adjustable length hinges, very comfortable to wear and easy to carry. And the best choices are available for listening to music, watching a movie, chatting online, etc. You can also insert SD card and can enjoy the music without any Bluetooth device anywhere, anytime. A cool singing outlook adds a fashionable feel.