High-precision encoder knob: This DC power supply is equipped with a high-precision encoder knob. You can press the knob to switch each number, and then rotate the knob in the range of 0-9 to customize each number. Set the desired voltage or current more accurately. The setting options for voltage or current can be switched by the (V/A) button. Output enable/disable button: In the process of using the bench power supply, the output button can prevent us from forgetting to turn off the output and causing damage to the load. Simply press this button to turn on or off the output of the bench power supply. This makes it more convenient for you to use the power supply. Overcurrent protection: When the OCP function is turned on, if the load device is short-circuited during operation, the adjustable power supply will automatically stop the output and sound a buzzer alarm. Protect the adjustable DC power supply and load from damage. Four-digit display and silent mode: The bright display allows you to work comfortably even in dim light. You can also set the beep when turning on or muting as needed. Plug Type:US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the United States, the Philippines and so on./EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage:AC110V/AC220V Color:As Shown Material:Metal Package Contents: 1 * Power Supply 1 * Output Cable 1 * Power Cable 1 * Multilingual instructions Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.