... laser printers, high voltage cordless tool chargers, equipment with variable speed motors, electric shavers, and garage door ... Inverter.1. Approvals:CE mark / EMC / LVD/ RoHS2. Output wave form: Pure sine wave output (THD<3%)3. Power ON-OFF switch4. Thermo control ... QC department. Functioning Test: Outlook, Input voltage, Output voltage, Frequency, Socket type, Protection functions(Low battery voltage, ...