HygroClip 2 Probes for humidity and temperature measurementWireless frequency: 433.92 or 915 MHz (USA)for optimized communicationHighest possible measuring accuracy: 0.8 %RH and 0.1 COutstanding repeatabilityBattery life up to 6 yearsLarge storage capacity of up to 500, 000 measured valuesTransmission distance up to 300 metersWith USB or Ethernet receiver