This is the Airtronics MT-4 Pistol Grip 2.4GHz 4-Channel Radio with Telemetry System. FEATURES: Telemetry system includes updated temperature, RPM/speed and voltage displays in real time on the telemetry screen when using the included 4-ch telemetry receiver. MT-4 system also works with any Airtronics non-telemetry FHSS-2 and FHSS-3 receiver High-power FHHS-4T technology 18 model memory and model naming Model select shortcut (Direct Model) Telemetry logging Programmable fail safe Programmable switches, lever and dial Throttle offset Total, best and individual lap display Dual throttle mixing with dig and burn Four wheel steering mixing Normal, SSR and SHR servo modes Exponential and ARC adjustment Steering throttle and brake dual rate Step auxilliary and point auxilliary Auxilliary mixing Servo speed adjustment Center or parallel trim types Adjustable grip and throttle trigger Programmable low voltage alarm Selectable modulation type Receiver operates on four AA cells, NiCd or NiMH batteries, 2S LiPo or 2S LiFe/A123 battery packs One-year limited warranty through Airtronics beginning at date of purchase INCLUDES: MT-4 Transmitter #92010 RX-461 4-ch Telemetry Receiver Four AA-Cell Battery Holder RPM and Heat Sensors Extra Hand Grip Instruction Manual REQUIRES: Eight AA cells, four for transmitter, four for receiver Analog or digital servos of modeler"s choice, digital servos recommended in SHR or SSR modes SPECS: Transmitter- Output Power: 100mW Nominal Input Voltage: 4.8 - 7.4V Operating Voltage Range: 4.0 - 9.6V Dry Weight: 13.68oz (388g) Frequency: 2.4GHz FHSS-4T Receiver- Frequency: 2.4GHz FHSS-4T Nominal Input Voltage: 4.8 - 7.4V Weight: 0.34oz (9.6g) Dimensions: 1.43 x 1.04 x 0.64" (36.2 x 26.5 x 16.3mm) Fail Safe Limit: 3.5 - 7.4V (FH4T)/3.5 -5V (FH2/FH3) jxs 03/28/11 ir/jxs