A keypad includes a circuit board, a key, and a rotating member. The circuit board includes at least one first keypad switch and at least one second keypad switch. The key includes a first protruding post configured for actuating the at least one first keypad switch, and a second protruding post for actuating the at least one second keypad switch. The rotating member is rotatably connected to the circuit board and able to retain in a first position and a second position. In the first position, the rotating member prevents the first protruding post from actuating the at least one first keypad switch and allows the second protruding post to actuate the at least one second keypad switch. In the second position, the rotating member allows the first protruding post to actuate the at least one keypad switch.