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HTC Fetch: What can’t you do with this device?

The Fetch is a key fob-sized device, measuring approximately 2.9cm x 2.9cm and less than 1cm thick.

It works only with the HTC One mini, Butterfly s, and One max smartphones, and has a working range of 15m (slightly more than 49 feet), with a battery that will last 6 month before needing to be recharged.