Sun Port&reg; 30dB ~ 130dB 4 Digits LCD Display 0.1dB Resolution Digital Sound Level Meter with Sponge Ball Head (JC-ZYY-N) It is designed according to the IEC651 TYPE2 & ANSI S1.4 TYPE2. The accuracy is up to +/- 1.5dB, which can test the noise accurately. The LCD display shows low battery, measuring value, maximum value icon and measuring unit dBA. The sound level meter is compact and portable to carry anywhere. Auto backlight display and auto power off functions are available.