Microsoft Adaptive Mouse Rail & Thumb Support

The Microsoft J61-00001 is a mouse tail and thumb support designed to make the Microsoft Adaptive Mouse feel more natural and comfortable in daily use. By extending the rear of the mouse and adding a dedicated place for your thumb, it encourages your hand and wrist to rest in a neutral position, which can help reduce strain during long sessions at the computer.

Anyone who spends hours scrolling through spreadsheets, editing photos, writing code, or managing documents will appreciate how this accessory steadies the mouse and improves precision. The added control can also benefit users with limited hand mobility who need a setup that adapts to their specific posture and grip style.

At just 1.54 ounces, the rail and thumb support keeps the overall mouse weight light, so you will not feel burdened even when you move between meeting rooms or hot-desk locations. Its 2.8 × 3.2 × 1.5-inch dimensions fit neatly on crowded desks and slip easily into a laptop bag for travel.

A one-year limited warranty from Microsoft offers extra reassurance, making this a thoughtful upgrade for students, professionals, and anyone seeking a tailored ergonomic solution without adding bulk to their workspace.

• Encourages a natural hand and wrist position to help reduce strain
• Weighs only 43.7 g (1.54 oz) so it keeps the mouse feeling light
• Compact size: 7.05 cm wide, 8.08 cm deep, 3.91 cm high
• Extended rail and thumb rest improve cursor control and precision
• One-year limited warranty provides peace of mind