This is the Hitec Atom 3ch 2.4GHz Micro Receiver for use with Spectra 2.4GHz DSSS module and Aggressor 3DS radio systems. FEATURES: Very compact and lightweight Hitec M-BODA (Mini-Boosted Omni-Directional Antenna) Two year limited warranty from Hitec beginning at date of purchase YOU WILL RECEIVE: One 3CH 2.4GHZ Micro Receiver with Instruction Manual REQUIREMENTS: Spectra 2.4GHz DSSS module and Aggressor 3DS radio system SPECIFICATIONS: Size in inches: 1.22 x 0.75 x 0.47" Size in millimeters: 30.99 x 19.05 x 11.94mm Weight Ounces: 0.24 Weight Grams: 6.80