Thunderbird Thunderbird-36, Brushless Speed ControllerCondition:* New Surplus Stock, In OEM Packaging. As Pictured..Additional Notes:* Length: 1.5 (39mm)* Width: 1 (26mm)* Height: 0.35 (9mm)* Max amps: 36 (Current rating for full throttle operation with a 5 mph airflow over the controller)* Max volts: 15 Volts 3S LiPo 10 NiCad/NiMh* BEC: Linear Regulator 3 Amp Max* Castle Link CompatibleThunderbird Thunderbird-36