| Classic | GSM | Smart | Master & Slave | Extra Slave | |
| 510 / 511 | 025480 / 027934 / 512 | 513 / 514 / 515 / 516 | 517 | 518 | |
| Reliability | ++ | + | + | + | + |
| Depended to GSM network? | n | o | o | o | o |
| Distance between transponder / receiver | < 1000m | - | - | - | < 25 - 30m |
| Programming via SMS | n | n | o | o | n |
| Sleepdetection mode? | o | o | o | o | o |
| Status report per SMS | n | n | o | o | n |
| Status LED on Birth Alarm | o | o | o | o | o |
| Multi Birth Alarms on one receiver / SIM card? | o | n | n | o | o |
| Fitting under halter? | n | n | o | o | o |
| Fitting on anti-roll girth | o | o | o | o | o |
| SIM card costs? | n | n | o (status SMS) | o (status SMS) | n |