Please Note: 1.Battery not included (because not convinient for shipping). 2.With english user manual Introduction: This sound level meter is very small and light. It is an ideal tool to measure Sound Pressure Level in decibels (dB). It is used for sound quality control in factory, office, home, school, restaurant, hospital and construction site, etc. Specification: * Measuring range: 30dBA~130dBA * Accuracy: 1.5 dB * Frequency range: 31.5Hz~8.5KHz * Frequency weighting: A * Digital Display: 4digits * Resolution: 0.1dB * Sample rate: 2 times/second * AAA*3 Battery,not included * Operating condition: 0~40 10~80%RH * Storage condition: -10~60 10~70%RH * Weight: 144g * Dimension: 56.1*177*36.03mm Package Included: 1. 1 x Sound level meter 2. 1 x Operation Manual 3. 1 x Sponge Ball