Amazon has the Yi Discovery 4K Action Cam for $47.99 (52.99 0 5 coupon) with Free Shipping for a limited time. To get the discount, use the coupon code: NW2UIST9 at checkout.

The Yi Discovery action cam can record at 4K/20fps and 1080p/60fps and shoot 8MP stills. It features SONY IMX179 Image Sensor, a 150° wide-angle lens, one-button design with 2″ touchscreen, and built-in Wi-Fi (2.4GHz) for easy transfer of media.