Basic information: 

* models: RD303

* product type: wireless broadcast microphone clip type

* applicable equipment: apple mobile phone/android/bluetooth speakers

* use distance: indoor/outdoor 30 meters, 70 meters 

* transfer mode: UHF wireless transmission

* advantages: signal in real time, stability, less interference, high noise reduction, and more distance 

parameter

Transmitter:

1.Battery：3.7V/400mAh;

2.Charging voltage：5V±0.25V;

3.Working current：103MA±15MA;

4.Transmitted power：10DBM;

5.Standby current：45UA;

6.Frequency：500MHZ-690MHZ。

7.Working time：4 hours

Receiver:

1.Battery：3.7/400Mah;

2.Charging voltage：5V±0.25V;

3.Working current：89MA±5MA；

4.Standby current：30UA；

5.Frequency：500MHZ-690MHZ;

6.Frequency response：80Hz-10KHz

7.Working time：4 hours