Features:
Chipset CSR/BC352239A
Bluetooth version Version 2.0/class2
Operating distance 10M
Range of frequency 2.4 to 2.4835GHz ISM band
Operating range Up to 10m
Typical talk time 8 hours
Typical standby time 160 hours
Rx sensitivity ?80dBm (per 1%)
Rechargeable lithium battery 160mAh
Compatible Compatible with various Bluetooth enabled devices such as mobile phones， PDAs， and laptops，MP3/4/5，and so on

Package included:
1 x BH-503 Bluetooth Headset
1 x Charger
1 x User Manual