Motor intercom. Key Specifications/Special Features:
1.Driver can have clear conversation with passenger.
2.Voltage is supplied: UM-4 (GrAAA) x 2 festivals
3.Output: 1W
4.Frequency range: 20-20000 Hz ±3dB
5.Export: 320 Hm, 1.0W, 84dB ±3dB
6.Controller size: 63 x 56 x 19mm
7.Weight: 120g (controller without battery)
8.Usage temperature: -20 to +50deg. C
9.Microphone and speaker is for motorcycle use, it can fix on the helmet, for full  face and open face

Assembly:
Please pay attention to the installation of the battery
According to correct instruct putting battery of the controller
As it shows LED gives out light for a long time or sound quality
become poor, you need to change the battery
Please take out the battery when the item is not in use
It may need small instruments