The pen: can write massage controal by back screw (on/of) The Pen:IR EMITTER, 5MM. 940NM Wavelength Typ: 940nm Power Dissipation: 210mW Current, Forward If: 100mA Voltage, Vf Max: 1.35V Angle, Viewing: 50° Case Style: Radial Temperature, Operating Range: -55°C to +100C Current, If AV: 100mA LED / Lamp Size: T-1 3/4 Voltage, Vf Typ: 1.35V This LED is the most compatible diode for the Wiimote ...