The Medtronic N'Vision® clinician programmer model 8840 is a portable device that offers a single programming platform for the Medtronic implantable drug delivery and neurostimulation devices.
The clinician programmer is an external component of the system used to program the implanted neurostimulator. The programmer is equipped with a touchscreen display for data entry, telemetry head for device programming, and an infrared port through which communications can be established with compatible printers.

| Power source | Four AA commercially available alkaline batteries (LR6) (Do not use rechargeable batteries.) |
| Battery life | Approximately 40 hours (with fresh batteries) |
| Clock back-up battery | Type BR1225 lithium coin cell |
| Length | 22 cm (8.75 in.) |
| Width | 10 cm (3.75 in,) |
| Height | 4 cm (1.60 in.) |
| Weight (without batteries) |
680 g (24 oz or less) |
| Case material | Thermoplastic resin and magnesium |
| Telemetry cable | 90-100 cm (36-40 in.) |
| Screen color | 4 shades of gray |
| Screen size | 240 x 640 pixels |
| Serial interface | IR communication link (IrDA 1.0) |
This manual presents information for users of the N'Vision Clinician Programmer, model 8840 including an overview and description, as well as the use, maintenance, troubleshooting, and specifications of the Programmer.
This reference manual supports the Medtronic Enterra Neurostimulation System and the N'Vision Programmer. The guide supplements information provided in the neurostimulator technical manual. Device-specific information on indications, contraindications, warnings and precautions is located in the technical manual packaged with the Neurostimulator. Device-specific battery longevity information is located in the Neurostimulator technical manual.
Humanitarian Device: The effectiveness of this device for this use has not been demonstrated.