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!

Battery:Polymer lithium battery 45mAh
Bluetooth version： 4.1
Operating voltage：3.2v-4.2v
Sound unit：8MM moving speakers
Impedance：32Ω
Speaker sensitivity：105dB
Speaker Bandwidth：20-20KHz
Microphone sensitivity：-42+-2db
Bluetooth frequency：2.4-2.48GHZ
Bluetooth working range：10 meters
Bluetooth protocol：Headset/headfree/A2DP/HFP/HSP/AVRC