The RX900M (mono) and RX900S (stereo) are Digital ENG Receivers. They can have low power consumption and can be powered either internally with four AA Lithium batteries or externally with a 9 to 18 VDC power supply.
The RX900M can only be used with mono transmitters, the RX900S can be used with either mono or stereo transmitters.
RF Bandwidth: US Mode: 200 KHz / EU Mode: 125 KHz
Channel Separation: 500 KHz (700 KHz recommended)
Sensitivity: -100 dBm
Antenna Connector: 50-ohm SSMA Female
Weight: 4.0 oz (113 grams) with Battery
Dimensions: 1.25″ x 3.25″ x 5.25″ (32mm x 83mm x 133mm)
External Power: 9 to 18 VDC @ 200 mA (150 mA in Power Saver Mode)
Internal Power: Up to 4 Hours (4 AA) @ 470 mA (350 mA in Power Saver Mode)
Display: Graphic LCD Panel
All Specifications subject to change without notice