This small battery pack has enough power to keep your TimePilot Vetro electronic timeclock running for up to three hours during a power outage. It plugs into your Vetro clock and your Vetro power supply. It also acts as a surge suppressor, stopping power surges from damaging your Vetro clock. Case size: 3¼ x 2¼ x 1⅝ inches (85mm x 57mm x 42mm). Power cable: 13 inches (33 cm). Weight: About 4 ounces (121 grams). Input: Voltage: 5V-12V DC. Output: Voltage: DC 5, 7.5, 9 or 12 Volts Auto Selection. Current: 10W. Transfer time: 0ms (zero). Battery: Type: Lithium-Polymer; Capacity: 2000mAh. Protection: Input: Fuse for overload and short circuit protection. Output: MCU for Over Discharge, Overload, Short Circuit. Battery: Battery Protection IC for Over Charge, Over Discharge, Overload, Short Circuit Protection. Indicators: LED: Power On x 1, Function Alarm x 1, Battery Mode x 1, Charging x 1.