Introduction 4V 0.5A 500mA Power Supply Adapter for Essential Oil Diffuser Aromatherapy Humidifier ETL Listed Class 2 Power Adapter 100V~240V AC to DC 24 Volt 12W Converter 5.5x2.1mm Tip 6ft Power Cord. 18V AC to DC Power Adapter, Switching Adapter 12V 3000MA Specifications/Technical parameters/Technical Data Input Specification Voltage: 100-240VAC Frequency: 50-60Hz Output Specification Voltage: 18V Current: 1A Power: 18W Turn On Time: 15-30mS Voltage Accuracy: 卤3% Current Accuracy: 卤3% Efficiency: DOE Product Shell Features Protections Ultrasonic bonding & Whole sealing Security protection: SCP, OVP, OCP, OTP Tests Environmental Hi-pot Test: 3750VAC, 60S, 5mA max Lightning surge: up to 1000V (accept 3000V) Leakage Current: 0.25mA max Burn-in Test: rate load, 40卤3鈩? 4 hours Operating Temperature: 0-40鈩?/p> Storage Humidity: 5%-95%RH Storage Temperature: -20~+80鈩?/p> Temperature Coefficient: 0.05%/鈩?/p> Product Details Application: Home Appliance Adapter, Air condition conditioner, which including room air conditioner, electric fan, IT equipment, power adapter Voltage: 220V MOQ: 500 Units Features/Equipment characteristics 1) Quality case with ROHS Certificate 2) Power cord with power supply Advantage 1) It could indicate the customers how to choose suitable power adapter and battery charger 2) The certificates give the sell high quality and safety credit 3) Save lots of inspection cost for customer 4) The implementation of mandatory safety certification system highly protect human being's safety and heath. 5) Improve the competitiveness of our products in the international market. Q1: Will each of your power adapter tested before shipment? A: Yes, all of the power adapter will past the test before shipment. The last four processes of testing is Open Frame Performance Testing---Plastic Housing Integrated----4-hour Aging Testing---Drop Testing----Final Performance Testing---Packaging. Q2: What kind of power adapter you can offer? A: We can manufacture power adapter, battery charger and switching power supply from 5W to 200W.Battery charger: 5W-100W Q3. Do you have some new product coming? A: Our 400w power supply are comming soon New product PD charger: 30w 45w 60wUSB To AC Adapter suppliers website:http://www.ehpowersupply.com/power-adapter/usb-to-ac-adapter/