Description: Over-load protection, over-heating protection and short circuit protection. Isolation built-in constant voltage power supply module. Small size, high efficiency, full load aging test and low output . With case shell, more safety and beautiful Perfect for electronic hobby project, wide application, you can use it on radio, car audio, LED display, motor, cell phone, etc. Specification: Material: plastic Product detailed size: 40x28x22mm/1.57x1.10x0.87inch Modulation method Pulse width modulation (PWM) Transistor connection method Input voltage :110~220(V) Output power :3 (W) Output voltage :5 (V) Working efficiency :60-90 (%) Output noise :50-300mv Output voltage accuracy :3 (%) Voltage regulation rate :3 (%) Load adjustment rate :120 (%) Product Certification :cq Output current :0.6 (A) Working frequency :50-60 (HZ) Working temperature :-20~60(C) Scope of application :110V-220V Working environment temperature :-20~60 Package Includes: 1 Piece AC-DC Switching Power Supply Module Note: Color maybe slightly different due to different monitor. The above size is measured by hand, please allow slightly difference. Thanks