The Milwaukee 2117-21 REDLITHIUM USB 400L Neck Light offers bright, high-definition illumination with 400 lumens and adjustable 130-degree vertical rotation. Designed for durability and comfort, it provides over 8 hours of run-time with a REDLITHIUM USB 3.0 Battery. This neck light features customizable modes to manage output and run-time, IP54-rated protection against dust and water, and is resistant to chemicals found in shops. The swappable battery and quick charging capability ensure minimal downtime, making it a reliable tool in demanding environments.