| Features | 34288NI | 34788NI | 34788NI-H | 34988NI | 34998 |
| Fully-Automatic Function | Semi-automatic, manual valves | Yes | Yes | Yes | Yes |
| Automatic Dye Inject: 1/4-oz during recharge, user-selectable | – | – | – | Yes | Yes |
| Automatic Oil Drain: Shows amount of oil to replace | Yes | Yes | Yes | Yes | Yes |
| Automatic Oil Inject, user-programmable | 18480 or 18490 syringe required | Yes* | 18480 or 18490 syringe required | Yes* | Yes* |
| Refrigerant & Oil System Capacity Database for North American market vehicles | Optional, 34412-E | Optional, 34412-E | Optional, 34412-E | Optional, 34412-E | Optional, 34001 |
| A/C System Refrigerant Flush (Flushing adapters not included) | – | Yes | Yes | Yes | Yes |
| Save, print and store before and after service data | No save, optional printer 30038 | Yes, optional printer 30038 | Yes, optional printer 30038 | Yes, printer included | Yes, Mopria Print Service wireless printing |
| Visual & Audible Alarm / Notifications | – | Yes | Yes | Yes | Yes |
| Vacuum Leak Test and Monitoring | – | Yes | Yes | Yes | Yes |
| Automatic Air Purge: Eliminates system-damaging air without monitoring gauges or opening valves | Yes | Yes | Yes | Yes | Yes |
| Automatic Refrigerant Refill: Maintains a user-selectable amount of refrigerant in an internal vessel and signals when it’s time to change the supply tank, no monitoring is required | – | Yes | Yes | Yes | Yes |
| Vacuum Feature: Defaults to 15 mins, programmable up to 99 mins. “Remaining time” is displayed | Yes | Yes | Yes | Yes | Yes |
| WiFi / Bluetooth capable | Yes, requires 80211TMP or 80211VCI master kit | Yes, requires 80211TMP or 80211VCI master kit | Yes, requires 80211TMP or 80211VCI master kit | Yes, requires 80211TMP or 80211VCI master kit | WiFi, Bluetooth enabled from the factory |
| Display: Multilingual | Yes, 4.3″ 480×272 QVGA Color LCD | Yes, 4.3″ 480×272 QVGA Color LCD | Yes, 4.3″ 480×272 QVGA Color LCD | Yes, 7″ graphical LCD | Yes, 10.5″ hi-res touch screen |
| Refrigerant Charging | Low side only | High, low, or both sides | High, low, or both sides | High, low, or both sides | 123High, low, or both sides23123 |
| Refrigerant Management System: Displays refrigerant use & monitors remaining filter life. Prompts appear when 1/3 of filter life remains | Yes | Yes | Yes | Yes | Yes |
| Electric Vehicle: Capable of servicing high voltage electric compressor A/C systems | – | – | Yes | – | – |
| *34788NI uses one oil bottle; 34988NI and 34998 include two oil bottles and one UV dye bottle |
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