Built to fit perfectly on top of any DSLR lens, the Delkin SensorScope Inspection unit is equipped with 5x magnification & 4 ultra bright LEDs to illuminate the surface of your image sensor and expose the most minuscule particles. The quick switch of a button optimizes visibility so that users can proceed with caution in cleaning their camera to avoid discoloration & streaking in photos. It operates on two included CR2025 batteries and includes a handy two-compartment carry bag as well as front and rear protective caps.