Gitfu corporate gift expert, provides customised custom computer product, gift set, guaranteed imported chips, small order welcome, 10 days production 

GiftU excellent quality corporate premium. Enhance your brand image. GiftU your perfect gift & souvenir solution!

Built-in rechargeable 400mAh Li-ion battery, supports up to 3.5 hours playtime.
Built-in microphone hands free function answer your call without delay.
Auto-scan FM radio, use Micro USB cable to act as antenna.
3W speaker with enhanced bass. Micro SD TF card reader slot, support MP3

Bluetooth version: RDA 3.0
Frequency: 2.402-2.480GHz
Maximum output power: 3W
MIC Sensitivity: -38db
Sensitivity: Better than -82dBm
Distance: 10-30meters
Charge voltage: 4.8V -5.5V DC
Operating voltage: 3.7V -4.2V DC
Operating Current: 150MA
Quiescent Current:> 1UA
Battery: 400Mah