DigiBee+. (USB--> 16 Digital Inputs, 16 Digital Outputs and 4 Analogue Inputs) When you need both digital and analogue inputs AND digital outputs to your PC then there is no better choice than the Digi-Bee+. It has 16 Digital inputs, 4 Analogue inputs and 16 Digital outputs, all individually controllable. It comes with Logic-Lab Plus control software enabling beginners with no programming experience to easily set up their own control system.