An electrostatic discharge protection device includes a diode located in a substrate and an N-type metal oxide semiconductor device located in the substrate adjacent the diode, wherein both the diode and the NMOS are coupled to an input device, and at least a portion of the diode and at least a portion of the NMOS device collectively form an ESD protection device. The first coil has a helical shape, and is disposed on a distal end side of the guide wire. The position for the driving of the inverted pendulum arm by the rail and the driving of the footskate by the inverted pendulum arm are adjustable relative to each other so as to provide for multiple different stride lengths in exercising. This regenerating solution is used to recharge the ion exchange unit when required. The annular edge ring has a first side which faces the side of the semiconductor wafer and contacts firmly with the side of the semiconductor wafer. The status also indicates which product is the oldest to facilitate the transfer and use of the oldest product first.