This is the Hitec Aggressor 3DS 2.4GHz 3-Channel Surface Radio System. This version includes the Atom 3 Micro Receiver and one HS-325HB Standard Size Servo. FEATURES: 2.4GHz DSSS System Dual rate steering adjustable on the fly Steering and throttle End Point Adjustments Charging jack for optional NiCd batteries (not included) Audible power indicator with three battery status LEDs Atom 3 micro receiver has an operating voltage of 4.5 - 7V and can handle up to a 2-cell LiPo battery HS-325HB servo has heavy-duty resin gear train and 3-pole ferrite motor INCLUDES: Hitec Aggressor 3DS 2.4GHz Transmitter, HS-325HB Servo, 3-channel Micro Receiver, Servo Saver, 4-Cell Battery Box, Four Point 1.6" (42mm) Horn, On/Off Switch and Instruction Manual REQUIRES: AA Batteries: 12, eight for transmitter and four for battery box SPECS: Transmitter- Power Output: 300mW Current Drain: 190mA Power Supply: 8-AA alkaline, NiCd or NiMH batteries Frequencies: 2.4GHz (DSSS Direct Sequence Spread Spectrum) Receiver, HRCL4000- Number of Channels: 3 Frequencies: 2.4GHz DSSS Operating Voltage: 4.5 - 7.4V Size: 1.2 x 0.75 x 0.47" (31 x 19 x 12mm) Weight: 0.24oz (6.8g) Servo, HRCM3326- Speed: 0.19 sec/60° @ 4.8V, 0.15 sec/60° @ 6.0V Torque: 42.00 oz-in @ 4.8V, 51.00 oz-in @ 6.0V Size: 1.6 x 0.8 x 1.4" (41 x 20 x 37mm) Weight: 1.7oz (48g) jxs 01/26/11 ir/jxs