The FreeStyle Libre sensor is easy to apply and wear. Small and discreet, it automatically measures your glucose day and night for up to 14 days.
 
SPECIFICATIONS
Sensor life: up to 14 days
Size: 5 mm height and 35 mm diameter
Weight: 5 grams
Power source: 1 silver oxide battery
Memory: 8 hours (glucose readings stored every 15 minutes)
Operating temperature: 10°C to 45°C
Applicator and sensor pack storage temperature: 4°C to 25°C
Operating and storage relative humidity: 10%-90%, non-condensing
Water resistance: IP27- can withstand immersion into one metre (3 ft) of water for up to 30 minutes
Operating and storage altitude: -381 metres (-1,250 ft) to 3048 metres (10,000 ft)