<p>Digital diaplay: The kit has a PCB design with a real-time score display at the top of the digital tube, which gives you a quick readout of the values.</p> <p>Functional: The kit is suitable for students, engineers, hobbyists and anyone interested in game making to hone hands-on and soldering skills. And shipped loose, you will need to install it yourself.</p> <p>Comes with 7 games of the 51 single-chip game, enough to be strong.</p> <p>Need your own hands welding, simple and easy.</p> <p>Power supply:4x1.5V AAA batteries or USB DC5V, Choose one of the two and cannot be used at the same time. (batteries are not included)</p> <p>Maximum operating current: about 5V@80mA (dot matrix is fully lit, buzzer sounds)</p> <p>Sleep current: 5V less than 1uA</p> <p>It's DIY kits, needs to finish by yourself.</p> <p>Note:due to different production batches, the screen printing on the circuit board is different, and the Component parts may also be different, but it does not affect the use.</p> <p>Specifications:Purple Shell</p> <p>Colour:Black</p> <p>Material:PCB+components+plastic</p> <p>Package Contents:</p> <p>1 * DIY kit</p> <p>1 * shell</p> <p>1 * USB cable(USB cable color is random, and designation is not accepted)</p> <p>Only the above package content, other products are not included.</p> <p>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.</p>