Kyosho 69040D Mitsubishi JGSDF Type 10 Palm-Sized Bluetooth/Smart Phone-Operated Tank, Desert Brown Newly developed "iDriver" system provides control through your smart phone The tank feature a realistic finish with a weathered treatment, and is available in 3 different color patterns Features cannon and machine-gun sound effects Three AAA-size alkaline batteries provide long run times of more than 120 minutes This tank is ready-to-run, but some finer detail pieces must be added if you so choose  approx.10 minutes. Model plastic cement required