The device shown in the picture is a Digital Electrocardiograph from Carewell (likely the popular model ECG-1112M or a similar 3 or 12-channel model). Since the written description states that the device is "in its box with all its accessories, never used," here are the basic steps for operating it and troubleshooting any issues: 1. Initial Operation Steps Check the main power switch: These devices usually have a main mechanical power switch (I/O) on the back or side next to the power cord input. Make sure to turn it on first before pressing the front power button. Direct connection to electricity: Connect the power cable directly to the wall outlet to ensure power is supplied, and check if the AC/Battery Indicator light is on. Battery charging: New devices may come with completely discharged batteries due to storage and shipping. Leave the device connected to the power for several hours to fully charge the internal battery. 2. Checking the Fuses If the device shows no light or response at all when connected to power, the fuse located next to the rear power cord input might be damaged or need replacement. Open the small fuse cover and check the integrity of its internal wire, or replace it with the spare fuse that usually comes inside the box. 3. Technical Inspection Tips Remove the device from its protective foam and ensure all protective adhesive tapes on the display screen or buttons are removed. Open the thermal printer paper drawer and make sure the paper roll is installed in the correct direction (the grid side facing upwards towards the thermal print head).