The 120-10013-0001 (ET-2030A) from Coherent Corp. is a Photodetector with Wavelength Range 830 nm, Supply Voltage 24 VDC, Rise Time <50 ps, Bandwidth 30 kHz to 1.2 GHz, Active Area Diameter 400 µm. More details for 120-10013-0001 (ET-2030A) can be seen below.