Here's a prism solution that's ideal for night time or any low-light job condition. This prism features a strobing LED light. The red LED strobes every two seconds.

All electronics and the battery are securely built in to the canister. The battery — a Sanyo CR-1/3N — is the same used in many cameras and will function for approximately 48 hours before needing replacement.

The sealed prism canister features an M20 thread, which is standard for screw-in style canisters and fits all holders designed for screw-in style prisms.

Weighs 0.60 lb (0.26 kg)