... precision is +/-1C3. Stainless steel interior, Outer is painted steel panel 4. Front opening lockable door with full height handle 5 ... page 14, Audible and visual alarm: High or low temperature alarm, Power failure alarm, Low battery alarm, Door ajar alarm, Filter blocking alarm ... : CE mark for DW-HL328/538, ISO9001, ISO14001,ISO13485 20. Power supply: 220V /50Hz 1 phase, can change as 220V 60HZ ...