The V40 Max is a new and affordable gaming handheld designed to play a wide variety of games, not just very old titles. It features joysticks as well as shoulder buttons. The model's design is basically similar to a Game Boy, at least in terms of the display layout.
Specification:
Model: V40MAX.
Product Name: Handheld Gaming Console. Color: Black/Light Blue/Grey/Silver/Blue
Screen Size: 4.0-inch IPS HD Full Color
Screen Resolution: 720x720 Pixels
Aspect Ratio: 1:1
Processor: RK3326 chipset with 1.5 GHz 64-bit architecture
Battery Capacity: 3800mAh
Play Time: up to 10 Hours
Dimensions: 6.02 x 3.26 x 1.37 inches
Operating System: Simplified Linux System
Cut and paste from the selling website.