Features: *Upgraded / Metal road Wheel *Upgraded / Rubber Tires *Upgraded / Metal caterpillars tracks *Upgraded / Metal Sprocket Wheel *Upgraded / Metal idle Wheel *Upgraded / Metal Suspension Arms *Upgraded / 5000mAh High Power Rechargeable NiMH Battery *Upgraded / Gearbox version steel gear *Upgraded / Sound effect *Upgraded / turret rotate 360 degrees(left/right).(The old version can only rotate 320 degrees) Product function? *This tank can move forward, speed up forward and backward,accelerate backward, rotating, the barrel can be raised 30 degree. *The turret can rotate 360 degrees *Maximum vertical turning angel of gun (up/down) approximately 30-degree *Maximum climbing gradient (changeable on different road surfaces) *approximately 35-degree *Engine sound, machine-gun sound. *Specifications Gun Shell: 6mm standard BBs *Like real tank firing, shooting 6mm BB pellets with COOL hull-recoil action and firing sound effect. *Smoke effects simulator.Smoking like real tank from "engine". *Sound effects simulator.Each action acts with mimic real tank mechanical sound. *The complete electronic with remote control (Smoke and Sound system) *2.4Ghz radio control system, it supports many similar tanks combating together without radio intervening. Specification: Length: 21 inch,Width: 9.5 inch,Height: 7.8 inch?Scale: 1:16 Weight:17.5pound Warning: Please refer to the new version of the 2.4Ghz radio control system manual , because the old version of the manual is wrong.