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. Functional: The kit is suitable for students, engineers, hobbyists and anyone interested in game making to hone hands-on and soldering skills. Need your own hands welding, simple and easy. Comes with 8 games of the 51 single-chip game, enough to . Upgraded voice version: speaker simulates sound effects, uses speakers to sound, and comes with voice. Game sound effects, loud sound. 4 levels of volume adjustable, 0 is silent. Lively and interesting, immersive experience game. Automatic sleep function: console automatically enter sleep mode after of no operation. Manual sleep: Long the OK button on the menu interface to enter sleep mode. Enter sleep mode when is paused, and you still be in after waking up. If you enter sleep mode in the menu interface or in , you restart after waking up. Power supply:4xAAA batteries or USB DC5V, Choose one of the two and cannot be used at the same time. (batteries are not included) Maximum operating current: about 5V@170mA (dot matrix is fully lit, buzzer sounds) Sleep current: about 5V@0.2mA NOTE: It's DIY kits, needs to finish by yourself. 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. Specifications: Shell Colour:Black Material:PCB+components+ABS Package Contents: 1 * DIY kit 1 * shell 1 * USB cable(USB cable color is random, and designation is not accepted) 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.