The world's first app controlled chastity device. With the CellMate chastity device, it doesn't matter where you are or what you are doing. You, as the keymaster, have the power to decide if your submissive is allowed to be unlocked from his chastity. In combination with the app for Android and iOS you can simply set up your account and link the CellMate to your user ID. Every account has a unique user ID which can control multiple CellMate devices. When your first CellMate is paired to your account the first message you see is if you want to be a wearer or a keymaster. The keymaster decides when the CellMate unlocks. You have the ability to change your account setting to wearer or keymaster at any time with the approval of the keymaster. Submissive cannot cheat or escape. Single player self-locking mode Real time geo location and status. Designed for long time wearing. Ergonomic and breathable design. Long lasting battery life (8-12 months) Battery type: CR 14200 Two ring sizes included, Ø 47 & Ø 51 mm. Regular is 9.5 cm. The Cellmate works off of Cellular and Bluetooth only. Cellular worldwide and Bluetooth within distance of Bluetooth. If you do not have cellular service you will not be able to connect to the device unless you are in close range while using Bluetooth.