GAN 356 i Carry 2 Bluetooth 3x3 is an updated, chargeless bluetooth speed cube from GAN. It features improved performance that is comparable to some flagship 3x3s and the concept of an interchangeable battery is very convenient for some! Battery life ~ 700 hours Battery type Button cell Exterior finish UV Coated / Frosted Dual-adjustment GES Pro+ Magnet system Turbo Weight 88g Bluetooth functionality Connect your GAN cube to your phone's Cube Station app via Bluetooth and enjoy many cool features! The Cube Station app will give you statistics based on your solve times, training exercises, races with cubers across the world, and more! Changing the battery GAN advertises that the pre-installed battery is good for 700 (370 more than previous version) hours of use before it needs to be changed. Click here for tutorial to change the battery. Accessories included Storage box Storage bag Alternate strength tension nuts CFOP algorithm sheet