Features:

•  Stores 4000 readings ( optional up to 16000 )
• Recording interval of one second to 24 hours, via software freely adjustable
• Complete coverage of extreme values between the recording points 
• Measuring range: -10 ° C to +50 ° C
• Resolution: 0.1 ° C
• Tolerance: ± 1 ° C
• Contact output for alarm , thermostat, etc.
• Operation with lithium battery, life up to 2 years (on configuration)
• Values are retained even without battery
• Dimensions 55 x 35 x 15 mm (HxWxD)
• Weight: about 30g including battery