The TiVo Roamio HD Digital Video Recorder can record four simultaneous shows at once as it features four tuners. It can record up to 75 HD hours and 500 SD hours of recording in its 500 GB storage space. Equipped with a built-in Wi-Fi, this DVR lets you access Netflix, Pandora and YouTube and also works with any HD antenna or cable. Featuring the Full HD 1080p up-conversion, this DVR recorder saves and records all shows in enhanced definition.