Features: Radio Frequency: 315MHz (USA, Asia), 433.92MHz (Europe) Suitable for Window 98 / Me / 2000 / XP system Compatible with PC / AT Supports MS Office Operating Current: 15mA (transmitter), 10 - 12mA (receiver) Receiver Interface: USB HID Spec ver1.1, ver2.0 Specification Specification Model: PP-1000  Function: For Office and Teaching  Laser Color: Red Laser Pointer  Wavelength Range / CCT: 650nm  Shape: Pen Shaped  Material: Plastic