wavelengths: 820/850/1300/1550nm. With ST fiber adapter and 2017 adapter cap. 9V battery included. No power supply. Tested power value agrees with other power meter very well at 850nm (we were too busy to try other wavelengths ) . The Photodyne 17XTF is a portable Fiber Optic Power Meter for the wavelength ranges of 820, 850, 1300 and 1550 nm. Indication of power in dBm or Watt. 9 V battery operation, 10 memory settings for store/recall button, “zero” button for the reference with background light, auto-off-function. Comes with a choosed fiber optic adapter. “Analog Out” and “Tone Out” jacks. DC “Power in” jack.Manufacturer: 3M Photodyne Inc.The retail price for a new one is about US$1500.00. Specs: • Power Resolution: 0.01dB• Sensitivity: about -66dBm, Range: -67 to +5 dBm.• 9V battery included• Dimensions : 180mm (B/W) x 115mm (H/H) x 255mm (T/D)