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 ultra low output ripple. This switch power supply has low output ripple and noise, high output voltage accuracy. Perfect for electronic hobby project, wide application, you can use it on radio, car audio, LED display, motor, cell phone, etc. Specification: Input voltage: 85-265V Output power: 3W Output Voltage: 5V Current output: 0.6A Working efficieny:60-90% Output voltage accuracy: 3% Voltage adjustment rate: 30% Load regulation: 30% Working frequency: 50-60HZ Operating temperature: -20~+80 Modulation Mode: PWM Connection mode: half bridge Material: Plastic + electronic components Size: approx. 4 x 2.8 x 2.3cm/1.6 x 1 x 0.9inch Package Includes: 1 Piece AC/DC Converter Switching Power Supply Module with Case