This is a replacement Spektrum SRX200 2-Channel 2.4GHz FHSS Receiver. This receiver comes included with the Spektrum STX2 Transmitter System (SPMSTX200).

The SRX200 Receiver has a special water-resistant coating on the electronics to ensure reliable performance in higher than average moisture conditions. This conformal coating can offer mild protection from light drops of water. 

• DO NOT submerge this product under water for any period of time. If it is submerged, it may result in damage or loss of function.
• DO NOT pour water onto or allow excess water to come in direct contact with the product.
• DO NOT operate this product in heavy rain or snow.
• DO NOT expose this product to salt water (ocean water or water on salt-covered roads), contaminated or polluted water.
• In case of excess exposure to water or debris, immediately wipe down the SRX200 with a soft cloth, and allow it to fully dry before next use. 
  

Specifications: 
Type: FHSS 2.4GHz protocol 
Dimensions (LxWxH): 35.8 x 23.6 x 14.3 mm) 
Antenna Length: 8.27 in 
Channels: 2 
Weight: 8.8g 
Band: 2.4GHz 
Voltage Range: 3.5–9.6V

NOTE: The STX2 transmitter and SRX200 receiver utilize the FHSS 2.4GHz protocol and are NOT compatible with Spektrum DSM, DSM2 or DSMR transmitter or receivers.