This is the ultra-light XM+ receiver from FrSky - like the XM receiver, just way more range! (approx 400m)
This is a full range receiver, the same class as the X8R, X4R etc. receivers but at only 1g
SPECIFICATIONS:
- Dimension: 21.5*12*3.5mm (L x W x H)
 - Weight: 1.6g
 - Number of Channels: Up to 16CH from SBUS (1-15ch for PWM,16ch RSSI for FC)
 - Operating Voltage Range: 3.7 to 10V
 - Operating Current: 30mA @5V
 - Operating Range: 1km
 - With RSSI output on board: analogue 0 to 3.3V
 - Firmware Upgradeable
 - Compatibility: FrSky D16 mode
 
PACK INCLUDES:
- 1 x XM+ Receiver
 - 1 x pin header pack
 - 1 x manual