Features: 1. 100% brand new and high quality. 2. High voltage stability, small ripple coefficient, short circuit protection and perfect with and overcurrent protection 3. The power supply includes electronic switch, convenient to open the output load. 4. The voltage value is a digital keyboard or encoder input, shorten the voltage setting time, which overcomes the traditional potentiometer adjusting bad contact voltage instability. 5. Designed for laboratory, school, and the design of the production line and the use of electronic repair. Specification: Condition: 100% Brand New Model: DPS-305BM Power Supply Voltage: 220V ± 10%50/60Hz (110V order) Working Conditions: Relative Humidity: 80% Temperature: 0-40 ℃ Storage Conditions: Temperature: -10-70 ℃ Relative Humidity: 70% Output Voltage: 0-30V continuously adjustable (resolution 0.1V) Precision of Output Voltage: 0.5%+2 Voltage Stability: <0.01%+3mv Load Stability: <0.01%+3mv Recovery Time: 100us Ripple and Noise Voltage: < 1% VP-P Temperature Coefficient: <300PPM/C Constant Current Value: 0-5A Constant Current Output Current: 0-Nominal Value of Continuous Adjustable (Resolution 0.01A) Constant Current Output Precision: ±(1%+2) The Current Stability: <0.1%+3mA Load Stability: <0.1%+3mA Ripple and Noise Current: < 1% VP-P OCP Current Values: 0-5A, accuracy: ±(1%+2) Voltage Display Precision: ±(0.5%+2) (constant current state) Optional Style: EU Plug, US Plug Weight: Approx. 2039g / 71.9oz Size: Approx. 265 * 128 * 150mm / 10.4 * 5.0 * 5.9in Package List: 1 * DC Stabilized Power Supply 1 * Power Plug Note: New-style and old-style are shipped randomly.