This is the 2.4GHz Transmitter for use with the Revell Proto RTF Helicopter. FEATURES: 2.4GHz 4-channel transmitter with LCD display and built-in battery charger Mode I and Mode II functions Adjustable trim INCLUDES: One 2.4GHz Transmitter REQUIRES: Four AA Batteries, ASCP0302 SPECS: Length: 185mm (7.3") Width: 80mm (3.15") Height: 120mm (4.7") COMMENTS: This transmitter is designed for the Revell Proto RTF Helicopter and is not intended to function with other models. cnh 11/10/09 ir/jxs