The ROF-HSP-1200 from Beijing Rofea Optoelectronics is a Photodetector with Wavelength Range 400 to 1700 nm, Supply Voltage DC to 5 V, Bandwidth DC to 100 kHz, Active Area Diameter 1 to 3 mm (Photosensitive Surface). More details for ROF-HSP-1200 can be seen below.