| Model Name/Number | 4224SD |
| Circuit | Custom one-chip of microprocessor LS circuit |
| Power off | Auto shut off saves battery life or manual off (REC function) |
| Brand | Lutron |
| Sampling Time | Approx. 1 second |
| Operating Humidity | Less than 85% RH. |
| Operating Temperature | 0 to 50 . |
| Weight | 347 g/ 0.76 LB. * Meter only |
| Dimension | 182 x 73 x 47.5 mm ( 7.1 x 2.9 x 1.9 inch ) |