Welcome to the step-by-step guide to installing the Newangie Tabletop 808nm Semiconductor Laser Hair Removal Machine! First, connect the display to the host computer. Align the plug of the screen with the interface of the host computer, gently push in and tighten the knobs to ensure a secure fixation Next, remove the treatment handle. Align the handle's connector with the socket on the main unit, make sure the pins are aligned accurately, and turn the knob to tighten the connection. Now install the footswitch by inserting the plug into the designated socket of the main unit. Make sure the connection is secure Before starting the machine, fill the machine with deionized water. Attach the white funnel to the water inlet and slowly pour in water until it spills out of the overflow spout Thank you for choosing Newangie. for more product tutorials and updates, feel free to subscribe to our channel!