description 3.5 inch OCA full screen: 640x480 high definition IPS screen, the image effect is very clear. The toughened glass with double protection is scratch and drop-resistant for a thrilling gaming experience and better eye protection. 3900MAH large capacity battery: Built-in 3900mAh large capacity lithium battery. Long standby time and long battery life. Support for up to 6 hours of games. Supports fast charging via USB cable. It will bring you a lot of fun during travel or long journeys. Linux Open Source System: Supports vibration motors and supports more than 20 simulators: NDS, N64, DC, PSP, PS1, OPENBOR, CPS1 and CPS2, FBA, NEOGEO, NEOGEOPOCKET, GBA, GBC, GB, SFC, FC, MD, SMS, GG, MSX, PCE, WSC, multiple formats and 20 games switching, the game allows users to download related formats. Upgrade function: RG351V uses RK3326 chip, which is more powerful, solves the game frame loss problem, works perfectly and makes the game screen smoother. Supports WIFI online battle. Free Games: There are many free games on the hull which you can also download and add according to your preferences, all of which are original and not repeated. The Lingux system can add emulators and games in related formats. specification: Material: Plastic + Electronic Components Screen: 3.5 inch OCA IPS / 640x480 full screen. Processor: RK3326 1.5 GHz Quad Core. Graphics: Mali-G31 MP2. RAM memory: DDR3L 1 GB. Memory: 16 GB. TF card support: Support two TF cards, up to 256G. System: Open source Linux system. Language: Multiple Languages.