Datalogging Relative Humidity Temperature Pen meters-&-solutions The best part

The best part

Maximizes cooling system efficiency

In the count-down mode

this 6 inch ventilation kit will be the best grow tent air filtration and environment control system for your indoor cultivation

Yellow sticky traps are used to attract

Datalogging Relative Humidity Temperature Pen meters-&-solutions The best partRecords up to 32,000 data points that can be downloaded by plugging the pen directly into a USB port no cradle or cable necessary. Data logging can be programmed to begin immediately, at a predetermined time, activated by the unit's push button, or to continually roll over after a set number of data points. Green and red led lights indicate data logging and alarms. Comes with software, 3. 6V AA battery (3. 6V ER14250), tripod screw and a wrist strap.