Review on GamePi43 Handheld Game Console Kit - Raspberry Pi Retro Gaming Console, 4.3 inch 800×480 IPS Screen 🎮 Display Monitor for Pi 4 3 2 Model B B+ - Add-ons and Accessories - Portable and Classic @XYGStudy by Andy Edwards

Assembly was quite easy. It comes with an HDMI to Micro HDMI adapter so it will work with both Raspberry Pi 3b and 4. The seller clearly stated that it would NOT include 18650 batteries, but they did anyway. Convenient, but I don't trust batteries like this when they come from China. This also includes the disadvantage of this seller, he is from China. This means your order has enough items to fill the shipping container before it ships. It can take a few days or almost a month (which was in my situation). There are two flaws in this product, one of which is the design flaw.1. No external HDMI. Many portable kits like this offer external HDMI so you can connect it to your TV if you want. It doesn't offer this, although the Raspberry Pi 4 leaves one of its micro-HDMIs unused. No ventilation. This is one of the most common complaints about this product. There is no fan, not even vents for heat dissipation. Emulating some SNES games causes a lot of heat, which you will feel on the device itself.