Pull the cable tight. Elevate your game. Play smoother with the B4. Xtrfy's patented mouse bungee design is crafted to be both more stable and flexible – all to help gamers enhance their gameplay.

Flexible arm. The idea behind using a mouse bungee is to make your mouse movements smoother. So why not make it as fluid as possible? With a flexible silicone arm instead of the traditional metal spring design, the B4 is designed to follow every movement without resistance, giving you an unparalleled wireless feel.

Stable base. While the arm of the bungee needs to be flexible, the base must be stationary. Anyone who has experienced a mouse bungee slipping or tipping over during an intense gaming moment knows the importance of a low center of gravity. The B4 is engineered to stay in place.

5 color options. Black. White. Pink. Miami Blue. Retro. The B4 is available in all five color variants of Project 4, making it easy to match with your M4 mouse and K4 keyboard to create the perfect setup.

Quick setup. Detach the silicone arm for added durability when you're on the go. And set up the bungee quickly and easily when it's time to play. Insert the silicone arm into the base, slide the mouse cable into the groove of the arm, and clip it on the back. You're ready in ten seconds. (If you're not slow.)

Compact design. The B4 is designed to strike the optimal balance between a small footprint and sturdy construction. It is minimalist on your desk and compact in your bag.