Classic white open-fit stems whose case charges on a wireless pad, with big 14.2mm drivers, AAC, dual ENC call mics and an IPX6 rating.
The PR-4 is a white open-fit stem pair with one feature most budget pairs skip: its case charges wirelessly. Drop it on any Qi charging pad, the kind many phones already use, and it fills up without a cable. The buds themselves are glossy white stems with rounded heads that sit at the outer opening of the ear.
Wireless charging sounds like a small thing until you live with it. The case goes on the pad next to your phone every night, and you stop thinking about cables and ports. A cable still comes in the box for travel or for a pad-free desk.
A 36-hour total with the case keeps nightly pad charging relaxed: even if you forget for a couple of nights, the buds still have plenty in reserve. The charging guide explains case lights and what to do if a bud will not fill.
Bluetooth needs one note. The detailed specs describe Bluetooth 5.3, while the product name mentions 5.0. Either way, it pairs with any current phone, tablet or laptop.
| Spec | Value |
|---|---|
| Model | PR-4 |
| Fit | Open fit, rounded stem buds with no tips |
| Bluetooth | 5.3 in the detailed specs; 5.0 in the product name |
| Profiles and codecs | HSP, HFP, A2DP, AVRCP; AAC and SBC |
| Range | Up to 33ft (10m) with no obstacles |
| Driver | 14.2mm composite diaphragm |
| Microphones | Dual mics, ENC with CVC 8.0 |
| Total with case | Up to 36 hours |
| Case charging | Qi wireless pad or cable |
| Water resistance | IPX6 |
| Controls | Touch |
| Shell | Glossy white |
| Works with | iPhone, Android phones, tablets, laptops |
| In the box | Earbuds, charging case, charging cable |
| Warranty | 1 month |
Open buds usually sound light in the bass, because nothing seals the ear. The PR-4 answers with 14.2mm composite diaphragms, larger than the 13mm drivers in many stem pairs, which push more air and give a fuller low end than you might expect from an open shape.
Sealed buds still win on deep bass, but the PR-4 narrows the gap. The trade is the usual open-fit one: you hear the room around you, which is safer outdoors and easier on long calls.
| Listening to | How the PR-4 suits it |
|---|---|
| Podcasts and audiobooks | Clear voices, ears stay open |
| Pop and hip-hop | Fuller bass than most open buds |
| Videos on iPhone | AAC keeps the stream efficient |
| Loud trains | Outside noise competes, as with any open bud |
AAC matters most on iPhones and iPads, which send audio in AAC when the buds support it. Android phones may use AAC or SBC depending on the model; both play music well at this level.
For calls, the two microphones split the job: one focuses on your voice while the other samples the noise around you, and CVC 8.0 subtracts it. That makes the PR-4 a handy pair for conference calls, online courses and video chats from a busy home.
Range reaches about 33 feet with nothing in the way. Indoors, walls and your own body shorten it, so on a walk keep the phone in the pocket nearest the bud that tends to drop out first.
The first connection is the only one that takes any effort. Open the case, take out both buds, and choose the PR-4 from your device's Bluetooth list. After that, the buds reconnect by themselves whenever they leave the case.
If only one bud plays, return both to the case for a few seconds and retry. The left-right reset guide covers a side that stays silent, and the pairing guide helps with laptops.
Touch pads sit on the flat of each stem. The manual lists the PR-4's exact pattern; stem pairs usually map them like this:
Other tap layouts you may meet are on the touch controls page. Tap lightly with one fingertip; an open bud is held only by the ear's shape, so a hard jab can nudge it loose.
IPX6 means sweat, rain and hard splashes will not hurt the buds. Towel them off before docking, since the charging contacts should stay dry.
The PR-4 makes sense for someone who wants the classic white open fit, already charges a phone on a Qi pad, and would like the earbuds to join it. Big drivers, AAC and dual ENC mics make it a practical everyday pair.
Check these points before you pick it:
The DRQQ AirBuds 2 is the other open-fit pair with a wireless-charging case, plus ENC mics and IPX5. If you want Qi charging with a snug fit and a digit display, the TAGRY X08 reaches up to 60 hours. For an open pair with IPX7 and Bluetooth 5.4, the Jxrev J51 is a steady choice without wireless charging.
Gift buyers can relax about compatibility: the PR-4 works with iPhones, Android phones, tablets and laptops, and the white finish goes with any phone case. Wrap it with a small Qi pad if the recipient does not own one yet, and the wireless case makes sense from day one.
If the open fit suits you and a Qi pad already sits on your nightstand, the PR-4 turns charging into something you never think about.
It charges on standard Qi pads. Centre the case on the pad and check the light comes on; a cable is included too.
The product name says 5.0 and the detailed specs say 5.3. Either way it pairs with any current phone, tablet or laptop.
No. It is an open-fit stem bud that rests at the entrance of the ear, like the classic i12 shape.
It is rated IPX6, which covers sweat, rain and strong splashes. It is not meant to be submerged.