Groupon offers the Oregon Scientific Dual Lens ATC Chameleon HD Action Camera bundled with the Oregon Scientific ATC Vented Helmet Mount for $49.99 with free shipping. That's the lowest total price we could find for this bundle sold separately elsewhere by $93. (For further comparison, we saw the camera alone for $45 last week.) It features video resolution of 720p, split-screen synchronization for 1080p playback, built-in microphone, rechargeable battery, and dual FOV lenses.