ultrassay™ Precision Series Single Beam Vis Spectrophotometer has P1, P2, P3 and P4 four models. They’re the user-friendly instrument with advanced performance. With its optimized optical path design, it is highly accurate and reliable. It provides several basic functions, such as photometry test and quantitation test. Optionally, It can be connected with computers through USB interface and controlled by the included EasyUV 1.0 software. Bandwidth: 2nm and 4nm, Wavelength Range: 320-1050nm and 320-1100nm, With 5 inches touch color screen(480×272).