1/12 hobby Engine 0805B R/C Crawler Crane 27.095 MHzReady to roll R/C tracked construction machine. Features multi-function digital proportional 27.095 MHz transmitter. Dimensions: 37.375" long, 8.75" wide, 37.75" tall (max). Functions include forward-reverse, left-right steering, 360 degree body rotation, pivoting crane arm and working lift bucket with articulated jaws. Comes with all required batteries - 9V transmitter battery and rechargeable 7.2V receiver battery pack; plus AC battery charger.