ERCHAM MK1

ERCHAM MK1 is a one-handed gaming and productivity controller that combines a programmable keypad and full optical mouse control into a single ergonomic device. Instead of using a separate keyboard and mouse, ERCHAM lets you move the cursor, aim, click, scroll, and activate programmable inputs simultaneously with the same hand. Originally created to solve the lack of practical PC input options for people who can only use one hand, ERCHAM is designed as a high-performance peripheral first — not a medical-looking accessibility device. Key features include: • Integrated optical mouse sensor • Programmable keypad inputs • Fully ambidextrous architecture for left- or right-handed use • Adjustable hand-retention strap for stability while moving the device • Modular thumb controls • Scroll wheel and dedicated mouse functions • USB-C connectivity • RGB lighting • Customizable key and mouse mappings ERCHAM is designed for gamers, creators, professionals, amputees, people with limited mobility, and anyone who wants complete PC control from a single hand. The project began as a personal solution after ERCHAM's founder lost the use of his right arm and discovered that conventional PC gaming hardware still fundamentally assumes the use of two hands. What started as a DIY prototype has since evolved into a purpose-built commercial design. One Hand. Full Control