What does custom mean? It means I chose the best parts for the mouse and made it lightweight. Custom mouse: Viper mini. Mouse company: PMM. If you search, you'll find their cheapest mouse is 1000. Internal parts: Razer Viper V2 Pro, Neo 8k, 35g, Ultraglide paint, Skates: G305 Tiger ICE V2, Razer Hyper polling 8k, 300mAh battery. It comes with a bag, tools, and mouse screws. I ordered the mouse from America and waited two months for it to arrive. Used for only a week. I bought the mouse for 1330. Reason for selling: The size didn't fit my hand. I ship to any city in the Kingdom. Price: 500