MDHearing · On-device button
NEO XS
A small in-canal model with four presets and six case recharges described in support material.
- Controls
- On-device button
- Format
- Completely-in-canal
MDHearing
Brand overview
MDHearing hearing aids
Five current MDHearing models span NEO XS, NEO XS PRO, VOLT 4, VOLT MAX 2 and AIR 3. Earlier generations are kept separate from the current lineup.
Hearing Fieldguide is an independent guide. This page does not represent MDHearing customer service or an official brand store.
A model name is only the start
Choose your next MDHearing comparison
Keep the generation in the model name. AIR 3, VOLT 4 and VOLT MAX 2 are exact references, not interchangeable descriptions of every AIR or VOLT device.
| Exact model | Controls | Phone use | Stated power scope |
|---|---|---|---|
| NEO XS | On-device button | No app required | Up to 18 hours / 100+ hours including case |
| NEO XS PRO | App or on-device button | Smartphone app for personalized hearing | Up to 18 hours / 70+ hours including case |
| VOLT 4 | On-device button | No app required | Up to 20 hours / 80+ hours including case |
| VOLT MAX 2 | App or on-device button | Smartphone app for personalized hearing | Up to 15 hours / 60+ hours including case |
| AIR 3 | On-device button | No app required | Up to 16 hours / 60+ hours including case |
Read one model at a time
NEO XS
- Controls
- On-device button
- Phone use
- No app required
- Stated battery use
- Up to 18 hours / 100+ hours including case
NEO XS PRO
- Controls
- App or on-device button
- Phone use
- Smartphone app for personalized hearing
- Stated battery use
- Up to 18 hours / 70+ hours including case
VOLT 4
- Controls
- On-device button
- Phone use
- No app required
- Stated battery use
- Up to 20 hours / 80+ hours including case
VOLT MAX 2
- Controls
- App or on-device button
- Phone use
- Smartphone app for personalized hearing
- Stated battery use
- Up to 15 hours / 60+ hours including case
AIR 3
- Controls
- On-device button
- Phone use
- No app required
- Stated battery use
- Up to 16 hours / 60+ hours including case
Decide whether app personalization belongs in your routine
NEO XS PRO and VOLT MAX 2 document app personalization. NEO XS, VOLT 4 and AIR 3 use documented physical controls without an app. This is a difference in setup and adjustment, not a ranking of hearing outcomes.
Understand personalization and presets →Use the exact model’s power and support terms
A case-inclusive maximum includes recharge reserve. Direct-store appointments and trial terms should be checked against your order, especially when using an older support article or buying through another retailer.
Check the order-specific support →Based on the source-linked exact model records in this guide, researched October 25, 2026. Editorial selection framework added October 26. This is not a complete historical catalog, live stock check or hands-on comparison.
Models covered here
Compare across brands →
MDHearing · App or on-device button
NEO XS PRO
A compact in-canal model that adds app personalization and volume/program controls.
- Controls
- App or on-device button
- Format
- Completely-in-canal
MDHearing · On-device button
VOLT 4
A behind-ear model with directional microphones, four presets and a portable charging case.
- Controls
- On-device button
- Format
- Behind-the-ear
MDHearing · App or on-device button
VOLT MAX 2
A behind-ear model with app hearing profiles, directional microphones and remote adjustment support.
- Controls
- App or on-device button
- Format
- Behind-the-ear
MDHearing · On-device button
AIR 3
A rechargeable behind-ear model with four environmental settings and physical volume controls.
- Controls
- On-device button
- Format
- Behind-the-ear
Before choosing a MDHearing model
Compare the current model generation and control method. NEO XS and NEO XS PRO are in-canal designs; AIR 3, VOLT 4 and VOLT MAX 2 sit behind the ear. App connectivity does not automatically establish calls or music streaming.
Visit MDHearing for official support ↗