... laser printers, high voltage cordless tool chargers, equipment with variable speed motors, electric shavers, and garage door openers. ... from the use of a Pure Sine Wave Inverter.1. Approvals:CE mark / EMC / LVD ... voltage, Output voltage, Frequency, Socket type, Protection functions(Low battery voltage, over battery voltage, lack-voltage alarm. Protections:short circuit, overload, over temperature.) and ...