Computerised 10A speed controller for scale model boats, recommended for 380/385 & SPEED 400 type motors. Main motor drive voltage range 2 to 12 Volts. AUTOSET centre stick setting; selectable gentle/rapid acceleration. Motor stops if signal lost or receiver switched off. Screw terminal block connections for Motor and Power. External size 53.5mm x 37.5mm x 23mm (plus approx 8mm for the heat-sink). NOTE: This unit is not fitted with Battery Eliminator Circuitry (BEC).