Onset MX1105 HOBO 4-Channel Analog Data Logger (-20°~70°C)

Operating Range: -20° to 70°C (-4° to 158°F)

Logging Rate: 1 second to 18 hours

Time Accuracy: ±1 minute per month at 25°C (77°F) 

Battery Type: Two AAA 1.5 V alkaline batteries, user replaceable

Memory: 4 MB (1.9 million measurements, maximum) 

Size: 11.28 x 5.41 x 2.92 cm (4.44 x 2.13 x 1.15 in.) 

Weight: 123 g (4.34 oz) 

Included Items: 

  Tie wraps 

  Two AAA 1.5 V alkaline batteries (installed)

Manual