Ellipse, the Keyless U-lock, 28 Unexpected High-Tech Gifts For Him
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Ellipse ($199) is a Bluetooth-enabled, solar-powered lock that automatically unlocks when you approach, and it locks automatically when you snap the shackle into the lockbar. If your phone dies, just enter in the numeric code you chose during initial setup manually. If someone attempts to steal the bike, Ellipse will send an alert.