Features: This sound level meter complies with IEC651 Type 2 and ANSI S1.4 Type 2 With the measuring scope from 30 to 130 dB and automatic shifting function A and C weighting network selection High speed (FAST)/Low speed (SLOW) response rate selection Maximum (MAX) locking function Digital display, good anti-interference performance, power saving With the backlight feature, it is appropriate for gathering the sound data at night. To save power, backlight auto power off function is provided Composite material injection molding process is adopted for casing with anti-drop structure design. It is not only extremely wear-resisting, but also elegant With power saving and high-reliability circuit design, well-designed high-efficiency power supply circuit makes the batteries more durable SKU: X1IN10041 Package includes: 1 * MS6708 digital sound level meter 1 * Headphone plug 1 * Operating manual 1 * Cotton ball