... with many functions I. Summary HS6288E Multi-functional Sound Level Analyzer is a portable and intelligent instrument integrated with many functions ... ,1min, 5min, 10min, 15min, 20min,30min , 1h,8h, 24h,24h,Manual. Clock: Year, Month, Date, Hour, Minute, Second, running automatically.9 ... ~50°C, relative humidity: 20%~90% Multi-functional Sound Level Analyzer