The Trailer Eyes Wi-Fi Trailer Camera from Mark Point Corp. sends an image from the trailer to a smartphone or tablet to help owners keep an eye on their horses while traveling. It can double as a barn camera, and a weatherproof metal casing allows for indoor and outdoor use. Features HD picture quality in color, infrared night vision and a remote-control lens to zoom in and out as well as pan and tilt. Wi-Fi and cellphone service are not necessary for the camera to work. Recommended for trailers less than 30 feet long. $199.95; www.trailereyes.com.