Specifications：
Four simultaneous calls specifically for exchange of design Bluetooth radio, for aerial photography, Morocco tours, hiking, mountaineering, skiing, cycling team, fans must have the best mountain traffic jam
Upgrade enhanced version of 1200 meters 4 while motorcycle helmet intercom Bluetooth radio, ski mountaineering gift
4 referee / aerial by a group chat while the intake + Bluetooth Headset + FM radio
4 Air clapping referee calls between Videographers director effective range of up to 600 meters, truly in full duplex wireless communication between Bluetooth system of four people
DSP noise cancellation
Built-in lithium polymer battery capacity 500 mA
Standby time: 240 hours
Continuous talk or listen to music more than eight hours
Charging time about 3 hours
National 5 waterproof standard
FM tuner
4 people can talk at the same time

Feature：
Bluetooth Version: 3.0, Advanced A2DP & EDR Bluetooth
Chip: CSR BC5
Battery capacity: 550mah, battery type: polymer, charge and discharge times: 500
Operating voltage: 3.3V-4.2V
Talk time: 8H, Standby time: 150H, Charging time: 2.5H
Radio frequency: FM87.5 ~ 108MHz
Speaker power: 0.25W
Operating temperature range: -10 ℃ to + 45 ℃ (minimum and maximum operating temperature)
Charger Specifications: DC 5V 500mA

Package includes：

1 * Stereo Headset
1 * Power adapter
1 * 1200M Bluetooth receiver
1 * USB cable
1 * Manual
1 * armband