They can be purchased separately, and attached or, like the Davek Alert Umbrella, built into the object during manufacture. Examples of some tracking devices currently available include TrackR Bravo, Chipolo, Clap-Calp, Gabyls, iMote, Lupo, Moobox O2, Smart Unit, Pebblebee, and Tile.
Although the Davek Alert Umbrella is well constructed and elegant it is not the only smart umbrealla on the market. Two others worth looking at are Kisha, and Blunt.
The Davek Alert Umbrella is available to pre-order for $99 (£65) on Kickstarter (the early-bird discount price of $79 (£52) is still available, RRP $125 (£82)). Providing the campaign meets its funding goal, you should receive your smart umbrella by September 2015, but this is the estimated shipping date. The company will dispatch it to anywhere in the world for an undisclosed price.