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16 Character Membrane Keypad, key panel for Arduino made up of 10 Numbers, A to D keys and * and # Keys. - 10 Number Keys - 4 Letter Keys - 2 Symbol Keys - Self-Adhesive Backside
The Specifications of the Keypad are as follows
Contact resistance: 500 Ω
Insulation resistance: 100MΩ
Button force: 150 - 200 N
Bounce time: 1 ms
before you stick the 4 x 4 Membrane Keypad, the surface must be dry, dust and grease-free.