GPX Portable Cassette Player
- Plays and records cassette tapes with a built-in mono microphone
- AM/FM radio built in
- 3.5mm headphone jack, stereo earbuds included
- Built-in speaker for listening out loud
- 2 AA batteries required, not included
- 7.68 oz, detachable belt clip
Last refreshed Oct 2, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A portable cassette player and recorder with a radio, speaker and earbuds. Batteries are not included, and the dimension data in the listing disagree.
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ASIN: B00QDK4K8OModel: CAS337BCategory: Cassette Players & Recorders
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Overview
GPX brings back the cassette with a portable player and recorder that adds an AM/FM radio and a built-in microphone. A built-in speaker plays aloud, and a headphone jack takes the earbuds in the box.
The reason to buy is one pocketable unit that plays old tapes, records with its own microphone and tunes the radio. The limits are the need to supply batteries, a mono microphone and conflicting size entries.
Who it's for
Anyone with a box of old tapes, a dictation habit or a desire to record from the radio onto cassette can use it day to day. Someone who needs stereo capture, Bluetooth or rechargeable power should look at a different recorder.
Pros and cons
- Plays and records cassette tapes
- AM/FM radio built in
- Detachable belt clip included
- Earbuds and user guide in the box
- Batteries not included
- Mono microphone only
- Size entries disagree in the listing
Performance notes
Playback and recording run off two AA batteries, so battery freshness affects tape speed and stability more than anything else. The built-in microphone is mono, which suits voice and room sound rather than music. The small speaker is for casual listening, with the headphone jack as the quieter alternative.
Specifications
| Brand | GPX |
|---|---|
| Model | CAS337B |
| Dimensions & fit | |
| Item weight | 7.68 ounces |
| Dimensions | 4.72 x 1.57 x 4.72 inches |
| Compatibility & installation | |
| Plays through | Headphone, built-in speaker |
| Warranty & support | |
| Warranty | 90 days |
| Other details | |
| Headphone jack | 3.5mm |
| Microphone | Built-in, mono |
| Radio | AM/FM |
| Batteries | 2 AA required, not included |
| In the box | Belt clip, cassette recorder, earbuds, limited warranty, user's guide |
Frequently asked questions
Can I carry the GPX CAS337B on a belt?
Yes. A detachable belt clip is in the box, and the earbuds plug into the 3.5mm headphone jack. It needs two AA batteries, which are not included.
Can the GPX CAS337B record as well as play?
Yes. It records directly to cassette with the built-in mono microphone, and it also tunes AM/FM radio.
Does the GPX CAS337B have a speaker?
Yes, a built-in speaker for listening out loud, plus a headphone jack for private listening.
What comes with the GPX CAS337B?
A belt clip, the cassette recorder, earbuds, a limited warranty and a user guide.