Membrane Switch Specification Operation voltage: < 35 VDC Operation current: <100 mA Operation force: 30~500g Operation temperature: -35⊥~+70⊥ Contact bounce: 3~30 ms Contact resistacne: <100 ohms Open circuit resistance: < 100 Meg ohms Life expectency(min): 5x100, 000 Storage temperature: -35⊥~+70⊥ Usual Material: PC & PET We can use surface-mounted-technology to attach SMD LEDs on the circuit layer.