This is the Throttlepack AC 80W from MRC. Suitable for Ages 14 & Up. FEATURES: Compatible with just about every AC powered model locomotive and their sounds Special sine-wave output circuitry provides plenty of controlled power Separate, UL Listed power supply keeps the THROTTLEPACK AC footprint small Whistle/horn & bell buttons included Special "Booster" button for added power when needed Precise, slow-speed throttle control for realistic performance Direction button INCLUDES: One MRC Throttlepack AC 80W SPECS: Input: 120V AC 60Hz Output: 0-24VAC variable Total Output: 64VA Length: 8-1/2" (215.9mm) Width: 4-3/4" (120.65mm) Height: 4-1/2" (114.3mm)