This Pokemon Go wristband is a wearable device that allows you to catch Pokemon on the go -- even more so than the app. The Pokemon Go Plus is official merchandise that notifies the wearer if a Pokemon is nearby by vibrating and lighting up. It connects to your smartphone using Bluetooth Low Energy technology so you can still play the game without having your smartphone on you.
Although many people rarely go anywhere without their phones, the Pokemon Go wristband does allow you to save some battery power while still playing the game. LED lights will blink and vibrations will go off when you are in the vicinity of a PokéStop as well. Interacting with the wearable lets you continue to play the game.