Also known as: MMR-88, Sangean MMR88
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The Sangean MMR-88 is the quality pick of the emergency crank class: a genuinely good DSP-tuned AM/FM/NOAA receiver in a build reviewers call “built like a tank,” with an IPX3 splash rating, honest crank figures, and a street price around $50.1 The trades are real — a small 850 mAh battery, no AA option — and like every crank radio here it’s tone alert only, not SAME, with no shortwave.
Key takeaways The one you buy for the radio, not the gadget list. Best receiver and audio per dollar in the class, DSP tuning with 19 presets, IPX3, siren and SOS strobe. Honest crank math: ~1 min crank ≈ ~5 min of listening — a lower claim than rivals advertise, and one that actually holds up in measurement.2 Small 850 mAh battery, Micro-USB, no AA fallback — keep it charged; it’s not a power bank. Tone alert, not SAME — a plugged-in SAME desktop still owns the wake-you-up job. ~$50. Listening is license-free — no FCC anything, ever. Ranked in best emergency radios.
Overview
Most crank radios are gadgets that happen to contain a radio. The MMR-88 is a radio that happens to crank — Sangean is a serious receiver maker, and it shows. The DSP tuner pulls in AM (520–1710 kHz), FM, and all 7 NOAA weather channels with sensitivity and audio that embarrass same-priced competition, and 19 memory presets replace the dial-scrubbing the budget units force on you. The body earns the “tank” cliché: dense, rubber-armored, and formally rated IPX3 against spray — one of only two real ingress ratings in the current crank-radio field. An LED flashlight with strobe/SOS modes and an emergency siren round out the kit.
The design’s one big trade is energy storage: an internal 850 mAh Li-ion — a third the capacity of a Midland ER310 — charged via Micro-USB (no USB-C), with no AA fallback. Sangean spent the budget on the receiver, not the battery. Understand that and buy accordingly: this is a radio you keep topped up, not a power reservoir.
Alerting: tone standby, not SAME
The MMR-88’s alert mode is 1050 Hz tone-alert standby — muted on a weather channel, it wakes when the National Weather Service sends the attention tone ahead of any watch or warning in the transmitter’s whole footprint, counties away included. It is not SAME: no FIPS county filtering, no event-type display. For actually being woken to a tornado warning for your county, a $30 plugged-in SAME desktop radio beats every crank radio made; the MMR-88’s role is what comes after — grid-down listening with the best audio in the class.
Power reality: the honest 1:5
radiojayallen’s measurement — about 1 minute of cranking for 5 minutes of listening — is lower than what competitors advertise, and that’s the point: it’s a claim that survives testing.2 The small solar panel is a trickle maintainer, and the USB output with 850 mAh behind it makes phone charging nominal at best. In practice the MMR-88 wants to live on a shelf near a USB charger, with the crank and solar as the deep reserve. If your priority is maximum stored energy rather than receiver quality, the RunningSnail MD-092’s 4000 mAh or the ER310’s 2600 mAh plus AAs serve that mission better.
GopherTrunk alternative
One honest line: an SDR needs a computer and power, and the MMR-88’s whole point is needing neither — GopherTrunk doesn’t compete here. It complements: while the infrastructure is up, a $30 RTL-SDR running free GopherTrunk monitors and records your local public-safety, utility, and weather channels — the traffic that tells you what’s actually happening in an emergency. Start with our emergency scanner frequencies guide for what to program; keep the MMR-88 charged beside it as the works-without-anything fallback.
Who it’s for
- Buy the MMR-88 if you want the best-sounding, best-built radio in the crank class and your power plan is “keep it charged.” View on Amazon →
- Buy the Midland ER310 instead if runtime and the AA fallback outrank receiver refinement — that’s why it’s our overall pick.
- Need shortwave too? The Kaito KA500 adds it for similar money, with rougher edges. Full rankings and the SAME explainer: best emergency radios.
Sources
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Sangean MMR-88 product page — Sangean: DSP tuner, band coverage, 19 presets, IPX3 rating, 850 mAh battery, crank/solar/USB power, flashlight and siren. ↩
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Sangean MMR-88 emergency radio review — radiojayallen — measured crank runtime (~1 min ≈ 5 min listening), receiver and audio assessment, and the ~$50 typical street price. ↩ ↩2
Frequently asked questions
Is the Sangean MMR-88 the best emergency radio?
It’s the best-built receiver in the class — reviewers call it tank-like, and its DSP tuner and audio outclass same-priced crank radios. The trade is the small 850 mAh battery and no AA option, which is why the bigger-batteried Midland ER310 edges it as the overall pick.
How long does the MMR-88 run on a full crank?
About 5 minutes of listening per minute of cranking, per radiojayallen’s measurement. That’s a lower claim than competitors advertise — and it holds up under testing, which reviewers respect more than optimistic marketing.
Does the Sangean MMR-88 have SAME alerting?
No. It has 1050 Hz tone-alert standby, which wakes for any watch or warning in the whole NOAA transmitter’s coverage area — no county filtering. Pair it with a plugged-in SAME desktop radio if being woken to the right warning matters.
Is the MMR-88 waterproof?
It’s rated IPX3 — protected against spray up to 60 degrees off vertical. That’s genuine splash resistance in the rain, and one of only two formal ratings in this class (the Eton Scorpion II’s IPX4 is the other), but it is not submersible.
Can the MMR-88 charge a phone?
Nominally. There’s a USB output, but with only 850 mAh behind it you’d get a small emergency top-up at best. The MMR-88 is a radio you keep charged, not a power bank — buy a RunningSnail MD-092 or Midland ER310 if power-bank duty matters.