This is the Spektrum DX4S DSMR 4-Channel Surface Radio. The Spektrum™ DX4S 4-channel sport radio system offers an impressive list of features for bashers, boaters, rock crawlers and racers that make setup and driving more fun. Built around the frequency-agile Spektrum DSMR technology, the DX4S delivers outstanding range and response in all types of environments, especially those where a lot of 2.4GHz systems are in use at once. DSMR transmitters are compatible with DSMR, DSM2®, DSM® and marine receivers.

Features:

• Includes two Spektrum™ SR410 DSMR™ receivers
  
• Backlit LCD
  
• 30-model memory
  
• 3 grip sizes
  
• Integrated telemetry (requires a DSM® telemetry compatible receiver)
  
• 2 user-defined, programmable mixes
  
• Pre-set mixes, including 4-wheel steering
  
• Switch-activated mix rates
  
• ABS
  
• Vibe alerts
  
• SD card reader
  
• On-the-fly mix rate control
  
• Integrated antenna
  
• Inactivity alarm

• Transmitter
  
• (1) SR410 DSMR 4-channel receivers
  
• 3 grip sizes
  
• Switch harness
  
• Sticker sheet
  
• Instruction manual
  
• Bind plug
  
• (4) AA batteries