ITEM NAME:5PCS Rotary Encoder With Switch EC11 Audio Digital Potentiometer Handle M&E Description: Location number : 20 Pulse number : 20 Operating life : 30000 times Rated Voltage/Current: 5V DC/10 mA Size: 2.7x1.4x1.2cm/1.06x0.55x0.47inch Quantity: 10 Package included:10* Rotary Encoder with Switch.Location number : 20. Pulse number : 20. Quantity: 10.