package includes:<br />10 x rotary encoder switch<br />10 x nut<br />10 x gasket<br /><br />1. and high quality.<br />2.these are continuous rotary encoder switch<br />3.with built in push button switch (push to operate).<br />4.can be used for data entry as with modern in car cd players・ for volume &amp;amp; on/off control or data selection via led or lcd display.<br />5.perfect for use with pic or atmel microcontrollers.<br /><br />specifications:<br />rotary shaft length: approx. 12mm.<br />shaft diameter: approx. 6mm.<br />size: approx. 2.5cm x 1.5cm x 1.2cm.<br />position: 20.<br />pulse: 20.<br />output: 2-bit gray code.<br />closed circuit resistance: 3 ohms maximums.<br />max. rating: 10 ma at 5 vdc.<br />operating temperature range: -30 to 70 degrees celsius.<br />storage temperature range: -40 to 85 degrees celsius.<br />rotational life: 30000 cycles minimum.<br />switch life: 20000 cycles minimum.