Specification Binding : Misc. Brand : Gain Express Label : Gain Express Holdings Ltd. Manufacturer : Gain Express Holdings Ltd. Model : ‎SLM-30B NumberOfItems : 1 PackageDimensions_Weight : 0.47 PackageDimensions : L:8.58 X W:4.6 X H:1.6 PartNumber : ‎SLM-30B ProductGroup : Home Improvement ProductTypeName : TOOLS Publisher : Gain Express Holdings Ltd. SmallImage_Height : 75 SmallImage_URL : https://m.media-amazon.com/images/I/41qf1ETAp1L._SL75_.jpg SmallImage_Width : 75 Studio : Gain Express Holdings Ltd. Title : Decibel Meter, Bluetooth-Enabled Digital Sound Level Meter Portable SPL Meter 30~130dBA Range MAX/MIN Data Hold with LCD Display Backlight for Home, School and Workplace to Accurate Sound Measurement Weight : 0.5 WeightUnit : pounds