The Polaroid battery grip allows you to seamlessly interface with your camera to provide full control of all key features from shutter release to scene select (depending on camera model). The Polaroid battery grip combines a backlit LCD display and a IR remote + interferometer. The Canon 5D MKII, 7D, 550D / T2i, and 60D / T3i camera models all have a Polaroid battery grip with their name on it.
Expect to fork out around $90 for the Polaroid batter grip, and the IR remote to look different on some models.

Thanks to tubepro for the video demoing a timelapse using the intervalometer on a 550D

Technical Specifications

Attaches Through Cameras Tripod Mount And Battery Compartment.
Durable Rubberized Surface Improves Grip & Handling.
Backlit LCD Display Time/Date + Intervalometer Functions.
Multi Mode intervalometer for shooting stop action, time-lapse etc.
Provides Up To Double The Shooting Time When Used With LP-E6 Batteries Or Equivalent.
Can Also Be Used With Standard AA Batteries Thanks To Included Speed-loader.

For more information see Polaroid.

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