HHZ Respiratory Review

Transcend Micro 510 review: specs and price

3 min read By HHZ Editorial Next review

The Transcend Micro 510 is a 0.49 lb travel CPAP (4–20 cmH2O) with AirRelief exhale relief, optional AirMist waterless humidification, an optional PowerAway battery, an 8,000 ft altitude limit and FAA compliance. It costs $829 (13 Oct 2026) with a 3-year warranty. One caution: Transcend sells it as an auto CPAP, but its user manual lists CPAP as the ventilator mode, so confirm the modes before you buy. This review is based on documents, not hands-on testing.

How we reviewed this: HHZ didn’t test this device hands-on. This review is written from the manufacturer’s user manual and published specifications, linked below, plus a U.S. retail price checked on 13 October 2026. We don’t report comfort, noise or reliability impressions we haven’t measured.

Key specs

SpecTranscend Micro 510Source
Price (U.S.)$829cpap.com; Transcend also lists $829
Ventilator mode (manual)CPAP; Ramp and AirRelief are comfort featuresUser manual 104347 Rev B
Marketing name”Micro 510 Auto CPAP”, “auto-adjusting pressure”Transcend product page
Pressure range4–20 cmH2OManual
Weight0.49 lb (223.4 g)Manual
Dimensions3.6 x 3.6 x 2.4 inManual
Sound pressure (ISO 80601-2-70)31 dBA ±2 at 10 cmH2OManual
Sound pressure (Transcend “typical use” test)27 dBA ±2Manual
Exhale reliefAirRelief (EZEX): Off, 1, 2, 3Manual
Ramp0–45 min, auto-ramp optionManual
HumidificationOptional AirMist HME (waterless)Manual
BatteryOptional PowerAway (14.8 V, 4,800 mAh)Manual
Altitude0–8,000 ft, automatically adjustedManual
Operating temperature41–95°FManual
Design life5 yearsManual
FAAMeets FAA requirements; RTCA/DO-160 section 21 category MManual
Warranty3 years device; 90 days accessories; 1 year batteriesManual
IndicationOSA in adults over 66 lbManual

The “auto” question

Transcend’s product page calls the Micro 510 an “Auto CPAP” with “auto-adjusting pressure”. The performance table in the Micro 510 manual we downloaded from that page lists “Ventilator Mode: CPAP”, with a note that Ramp and AirRelief “do not represent separate ventilation modes”. We can’t resolve that from the documents. If you need auto-adjusting pressure (APAP vs CPAP), ask Transcend or your prescriber to confirm before buying.

Strengths on paper

  • Lightest we’ve documented: 0.49 lb, lighter than the AirMini (10.6 oz).
  • Battery option: the PowerAway battery attaches directly (CPAP battery power).
  • Longer warranty than the AirMini: 3 years vs ResMed’s 2.
  • Data: the MySleepDash app for therapy data.

Limitations

LimitationDetail
Mode ambiguitySee above
HumidityHME only; no heated humidifier
Altitude8,000 ft, lower than the AirMini (8,500 ft)
WarrantyNon-transferable; void outside the country of purchase
SoundThe standards-based figure (31 dBA) is higher than the 27 dBA in marketing

Flying

The manual says it meets FAA requirements (RTCA/DO-160 section 21, category M). Check your airline’s carry-on and in-flight power policy before you fly.

Verdict

From the documents, the Micro 510 is the lightest and cheapest of the two main travel CPAPs we track, with a battery option and a 3-year warranty. The mode question is the key issue: if your prescription is for auto-adjusting pressure, get written confirmation that this unit provides it. For a confirmed auto machine, compare the ResMed AirMini.

Related: best travel CPAP machines, buying CPAP online or used, CPAP dry mouth.

Frequently asked questions

Is the Transcend Micro 510 an auto CPAP?
Transcend markets it as the 'Micro 510 Auto CPAP' with auto-adjusting pressure. However, the technical specifications in the Micro 510 user manual (104347 Rev B) list the ventilator mode as CPAP, and describe Ramp and AirRelief as comfort features rather than separate modes. Ask your prescriber or seller to confirm which modes your unit supports.
How much does the Transcend Micro 510 weigh?
The Micro 510 user manual lists 0.49 lb (223.4 g) and dimensions of 3.6 x 3.6 x 2.4 in. Transcend's product page says it weighs under 0.5 lb.
How loud is the Micro 510?
The manual gives a standards-based sound pressure level of 31 dBA (±2) at 10 cmH2O, measured per ISO 80601-2-70 without a mask. A supplementary 'typical use environment' test gave 27 dBA. Transcend notes the standard values don't represent what a user hears during sleep.
Does the Micro 510 have humidification?
Not built in. The optional AirMist HME (heat and moisture exchanger) provides waterless humidification. HME cartridges are disposable and aren't cleaned.
What's the Micro 510 warranty?
Three years from original retail purchase by the initial consumer, per the manual and Transcend's site. Accessories and disposables are 90 days and batteries 1 year. It's non-transferable and void outside the country of original purchase.

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