The Boekel Scientific Digital Forced Air Incubator line features a digital control system with built-in timer and a door with a large viewing window. For light-sensitive incubations, easily omit ambient light with the included, removable photoprotective door panel. The 1.4 and 2.5 cu ft models come equipped with 1 internal auxiliary outlet, and the 5.0 cu ft size features 2 internal auxiliary outlets.