Just leave them to do their logging then using the Kestrel LiNK app for smartphones, download the data once in Bluetooth range. While in Bluetooth range, you can view real-time data as well. The DROPS come in three basic configurations as well as job specific versions.
Kestrel DROP D2AG Livestock Heat Stress Monitor
$103.100 CLP
Kestrel DROP D2HS Heat Stress Monitor
$103.100 CLP
Kestrel DROP D3FW Fire Weather Monitor
$131.400 CLP
