Features: 1. Using DC-DC power saving chips running @95.2% power efficiency compared with others -3.3(66.7% power efficiency), which means 30% battery life. 2. High quality Black PCB board with real gold , and 1.2mm thickness improvements(others 1.0mm), which means better conduction on Old Game gear slot. 3. based Flash cart with external -SD, Saving files keep more than 10 Years without battery. 4. Newest firmware with Game Gear, SMS, SG-1000 game support. for Game Gear ROMS Download: https: //romsmania.cc/roms/game-gear Note: The compatibility of this product to games is not 100%, and it can be compatible with more than 98% games after the previous test. The sticker on the product from batch to batch, it does not affect Material: Plastic colour: black Package Contents: 1 x Flash Cart Game Card(Internal 8GB memory card) 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.