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产品简介：
技术参数：
| applicable stangdards | iec pub 60651 type2, ansi s1.4 type 2 |
| digital display | 4digital lcd, 0.1db resolution,up-dated every 0.5s |
| measurement level | 25～130db |
| measurement frequency range | 31.5hz to 8 khz |
| frequency weighting | a and c |
| time weight | fast and slow |
| microphone | 1/2 inch electret condenser microphone |
| measurement level range | 5 ranges in 10-db step:25～80db 30～90db 40～100db 50～100db 60～120db 70～130db |
| quasi-analong bar indicator | 1-db steps,60db display range ,up-dated every0.125s |
| display warning function overrange indicator underrange indicator | ov displayed at the upper limit un displayed at the lower limit |
| manual data memory capacity | 99 sets |
| analong ac/dc output | 2vrms (at full scale), 10mvdc/db |
| power supply | one 9v battery (006p to iec6f22) ac adapter |
| battery life | about 50 hours |
| weight | approx.310g |
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