BQ638 Car charger&Bluetooth headset combo
1\ V4.1 Bluetooth headset with car charger, fully compatible with bluetooth-enabled devices,
high performance of anti-interference,up to 10m working range.
2\ Bluetooth Multipoint Connection ，support one headset to pair with dual devices at the same time.
3\ The charger with adoption of high quality IC and optimized circuit design.The charger
with rated output current reaching 2.4A,not only for bluetooth headset charging ,but
also as a USB charging port for other devices.
4\ More functions:Handsfree answer/end calls,safe and fast charging with high rated output power.
Bluetooth version: V4.1
RF Range：10M (without obstacles )
Charging means: 1*2.4A USB Charging Port
Bluetooth standard: Class 2 (-6dbm – 4dbm)
Profiles supported: HSP,HFP,A2DP
Talk time: up to 4 hours
Playing time: up to 3 hours
Standby time: up to 100 hours
Charging time：about 2 hours
Input: DC 12V-24V
Output: DC 5V/2.4A
Voice chat: Supported