Portable 30 To 130 Decibel Reference: The compact handheld form and product info value of 30 to 130 decibels walk around use when you need a sound meter for rooms, classrooms, workshops, or factory areas Fast And Slow Response: Choose fast or slow response modes to follow brief sound changes or steadier sound conditions, helping you compare different situations with simple button control Backlit LCD Display: The bright backlit screen supports clear number viewing in bright or dim spaces, while the front button layout keeps hold and response functions close during regular use Meter And Battery Reminder: Includes 1 digital sound meter and requires 3 batteries that are not included, so you can prepare power before first use and start checks with less delay Clear Sound Readings: This handheld digital sound meter helps you check changing sound conditions with a readable screen, giving quick reference data for home, school, factory, or workshop tasks, Manufacturer: Mekalero