The stealth evo delivers basic cycling functions plus a few impressive upgrades from the stealth 10 the stealth evo sets up in a flash and uses gps technology to calculate your position quickly new functions include current altitude manual startstop and a programmable display that allows you to select the data you choose to view after the ride upload and share data on cateyeatlastm stravatm or traininpeakstm the evo designed for social cycling simplicity battery lithium ion rechargea