Metrosonics® Chamelon Sound Level Meter Chameleon Sound Level Meter is a single instrument that adapts to the needs of both novice and advanced users. It comes standard with the ability to measure basic data including SPL, Lmin, Lmax, Lpeak and battery voltage. The lightweight, ergonomic design and 5 minute "Get Up and Go" guarantee, plus its 40 hour life on a 9 volt alkaline battery, make the Chameleon convenient and easy to operate. Optional feature packs are available to extend the functionality of the Chameleon to include integration and/or data logging.