Semiconductor Nano Wavemeter Wrist Laser Instrument $ 32.76 Product information: Material: Composite Power mode: USB Applicable part: hand Technical parameters: Laser medium: GaAlAs Semiconductor Laser wavelength: 650nm20nm Single laser output:5MW Battery voltage: 3.7V Adapter: DC5V / 1A Ambient temperature: 5C-40C Relative humidity:80% Atmospheric pressure: 500kpa-1060kpa The package includes: 1 x wrist semiconductor laser instrument (light wave instrument) 1 x adapter 1 x nasal laser head or dual nasal laser head 1 x user manual