This is the Futaba R204GF-E-S-FHSS 2.4GHz Four Channel HV Micro Receiver.

FEATURES: Ideally sized for 1/10 and 1/12 scale vehicles including rock crawlers Compatible with any Futaba S-FHSS/FHSS system S-FHSS mode offers two operation modes: Normal and High Speed responses Internal antenna One year limited warranty through Hobby Services beginning at date of purchase

INCLUDES: R204GF-E-S-FHSS 2.4GHz Four Channel HV Micro Receiver

SPECS: Operating Voltage: 4.8 - 7.4V Receiving Range: 230' (70m) Battery Failsafe: 3.8V Current Drain: 30Ma (at no signal) Size: 1.38 x 0.91 x 0.35" (35.1 x 23.2 x 9mm) Weight: 0.21oz (6g)  

BOX DIMENSIONS: 2.50" W. X 1.38" H. X 3.25" L. BOX WEIGHT: .10 LBS.