This is the MX-3 Sport 2.4GHz FHSS-2 Digital Proportional Radio System from Airtronics. FEATURES: LCD screen displays digital adjustments and settings Four edit keys for setup 10 model memory Dual rate steering Digital trim 2.4GHz 3 channel pistol grip INCLUDES: One 3-channel 2.4GHz Pistol Grip Radio One RX-371 Receiver One Battery Tray One Switch Harness REQUIRES: Eight AA batteries for transmitter Four AA batteries for receiver Servos of modeler"s choice SPECS: Transmitter- Model: MX-SG FHSS-2 Power Supply: Eight AA alkaline dry cells DC 12V or 8 cell NiCd pack Weight: 105g (3.7oz) Frequencies: 2.4GHz ISM Band Receiver- Model: RX-371 Power Supply: DC 4.8-6.0V Weight: 9.5g (0.34oz) Frequency: 2.4GHz ISM Band Dimensions: 1.03"(L)x1.18"(W)x0.62"(H) (26x30x15.7mm) cnh 11/11/09 ir/jxs