This is the Bachmann® E-Z Command® 5 Amp Power Booster. Suitable for Ages 8 & Older. FEATURES: Intended for indoor use only. Provides extra current to the track so an increased number of DCC locomotives can run on your HO, N, O, or Large Scale layout. Output voltage can be adjusted to meet your scale requirements. Can be used with any NMRA/NEM-conformant DCC system. Air vents and a fan to ensure proper ventilation and prevent overheating. SAFETY FEATURES include: * Thermal overload protection * Opto-isolation (current) interface that consumes 30ma. This eliminates any possiblility for hidden ground loops thru your power station * 7V signal on the DCC bus to prevent the booster from accidentally sending power to track when the command station stops sending signals Green LED indicates that power is on. Red LED indicates an overload or short circuit. The Power Booster is protected by a thermal circuit breaker which resets when the short circuit or overload is corrected. Both printed and DVD format instructions. INCLUDES: (1) E-Z Command® Power Booster (1) 5 Amp Power Supply (1) E-Z Command® Signal Input Wire (1) Universal Signal Input Wire (1) Track Output Wire SPECS: Power Supply Input: DC 18V 5A Output (Track Voltage): selectable 14V or 18V Output Current: limited to a max. of 5A kr10/4/06