10PCS 4 x 4 Matrix Array 16 Key Membrane Switch Keypad Keyboard for Arduino AVR

Switch travel: touch-type: 0.6 ~ 1.5mm. Dielectric Strength: 250VRms (50 ~ 60Hz 1min). Vibration: 20G, max. Temperature: from 40,90% to 95%, 240 hours. Storage temperature: -40 to +80. Insulation resistance 100M (Ω).

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