Zuosheng 0 mAh Wired & Wireless Power Bank  (Black, Alkaline, NA for Laptop)

Precision Encoder Knob Press to switch digits and rotate for 0-9 adjustment, enabling ultra-accurate voltage and current setting. Output On/Off Control Dedicated button to enable/disable output, effectively avoid damage to connected devices. Overcurrent Protection Built-in OCP function. Auto cuts output and triggers alarm when short circuit occurs for dual safety. 4-Digit LED Display Accurate to 0.01V / 0.001A, auto switch between CV and CC modes. Screen brightness is adjustable. 18W USB Fast Charge Extra fast charging port for quick powering up phones and other gadgets. Compact & Portable Small size and light weight, saves bench space and easy to carry around.