M1 Modular E-Stim Probe
The most advanced E-Stim probe in existence. That's a bold claim. We can back it up.
How It Started
The M1 didn't start as a platform. It started with one idea: use the probe as an anchor point to hold a perineum pad in place during use.
That idea changed everything.
In testing, the perineum pad acted as a pivot point. The slightest contraction of the pelvic floor muscles caused the probe head to rock against the prostate — exactly like an Aneros massager, maybe better. And that was before the E-Stim even turned on.
Once E-Stim came to the party, the probe literally rocked. The movement, the stimulation, the way it made the prostate respond — we'd never experienced anything close to it, and we'd tried most of what's on the market.
The early prototype was the P1t — a solid one-piece probe, about 5 hours per print. Every design iteration meant another 5-hour wait. That frustration led to the question: what if the pad was detachable? What if everything was?
That's how the M1 Modular was born.
8 Patentable Innovations
As the M1 came together, we kept hitting on ideas that didn't exist anywhere else. Eight of them are unique enough to patent. We're documenting them here so nobody else can swoop in and claim them.
- PlaLok™ Modular System — the click-lock platform architecture
- Multi-shape head and base ecosystem — expanding library of interchangeable components
- Interchangeable accessory rings with hands-free retention
- Configurable pole count — up to 7 conductors in the 32mm heads
- Interchangeable insulator lengths — adjusting the length adjusts the pressure and where it sits, greatly altering the sensation
- Conductive screw — adding an M2 screw to the port connection mechanically strengthens the head and increases conductivity without electronics
- Dual-function banana plug locking — standard 4mm plug serves as both electrical connection and mechanical lock
- Internal insulator as wire conduit — moves the conductor close to the head, further reducing resistance and simplifying construction
The PlaLok™ System — No More Compromise
Every component in the M1 system is interchangeable, and we spent considerable time perfecting the fit, rotation, and locking feel of each interface.
The head inserts into the insulator shaft via two heavy-duty tangs and locks with a 90° turn. The shaft inserts into the base with two tangs and a connection that runs the full length of the base, locking with a 45° turn. The ring — insulating or accessory — inserts into the base with four tangs and locks with a 45° turn.
With all pieces installed, hold the head and the ring and twist 180°. You'll feel a series of satisfying clicks as each piece locks into place. When fully assembled, give it a firm pull and check the visual lock indicator to confirm everything is secure.
Note: M1 system components are consumable and will wear with use. Read the Care and Safety Instructions.
About The Series
There are 4 planned series of M1 probes, the series is also the shaft diameter.
20,22,25,32 Series
Some of the Series support multi-conductor heads.
Accessories are interchangeable among the series. Insulators, Heads, Bases and Rings are not interchangeable, and must be of the same series.
The 20 Series is the smallest, and supports single conductor heads. It is the recommended starting size.
The 22 Series supports up to 2 conductor heads, you may notice the size increase.
The 25 Series is noticeably larger, and you can feel that in use. It supports up to 3 conductor heads.
The 32 Series is a big boy, very noticeable shaft, supports up to 7 conductor heads.
Heads
Cylinder Head — Even stimulation, fuller feeling. The base is angled at 45° to maximize the pulling force from muscle contraction.
Sphere Head — Smaller contact surface means more intense, focused sensation. Very comfortable, with strong pull response.
More head styles are in development and will be added to the ecosystem over time.
The Conductive Head Screw
Under each 4mm connection port in the head, there's an M2×40mm screw hole. Even without the screw installed, printing the hole causes the slicer to build a solid 6-wall column around it — increasing both strength and conductivity at the connection point.
Install the screw and you get an extremely conductive channel directly under the 4mm port, reducing resistance by approximately 30% and reinforcing the weakest part of the neck. It's optional, but it's there if you want it.
Bases
Base FortyFive — Angled for maximum movement intensity. A lively, active base.
Base Curved — More intense clenching sensation with less motion. More of the conductive surface is positioned in the internal canal with less slope to travel.
Base Sloped — Maximum movement range. Sensation varies as more or less surface makes contact during use.
Rings
Standard Insulating Ring — Provides a clean insulating surface at the base. More conductivity where you want it, less where you don't.
Accessory Ring — This is the "wait, there's more" moment. Snap on an accessory and the M1 stops being just a probe — this ring unlocks an ecosystem of experience-changing accessories that make everything above look like a warm-up.
Accessories — PeriPla™ and ClitPla™
The accessory ring accepts two launch accessories, each locked and powered by a standard 4mm banana plug. The plug simultaneously completes the electrical connection and locks the accessory in place — hands-free, no straps, no tape.
PeriPla™ Perineum Pad Sits directly beneath the prostate, creating a current path to exactly where you want it. It also serves as the pivot point for the probe's rocking motion — amplifying movement and pressure variation in a way that no adhesive pad can replicate. The physical movement this pad enables is significantly more than expected. Sessions with the PeriPla are in a different category.
ClitPla™ Clitoral Pad For users without a prostate, the M1 used internally holds a ClitPla™ pad directly over the clitoris and its shaft — hands-free, no hardware, no compromise. Muscle contractions from the probe cause the pad to move with the body, enhancing sensation continuously. This is the first clitoral E-Stim solution we've found that actually works. We've tried half a dozen designs. So have the major manufacturers. Nothing has come close.
The Real Cost of No Compromise
You know how it goes. You're on a product page looking at 70 different probes, wanting to try all of them. You end up picking one. Next week you want a smaller head — that's another $100. Oh, and that big head looks fun — another $150. It never ends.
For reference: to buy all ~70 insertable electrodes from just one manufacturer — E-Stim Systems Ltd — would run you roughly £5,400–£6,000 GBP (~$6,800–$7,600 USD). That's one company.
With the M1? New head — $17. New base — $15. New insulator — $5. You get it.
But here's the part that actually gets me: even if you spent that $7,600 and bought every probe from their catalog, you'd still be missing out. There are head and base designs that simply can't be built on a lathe. Shapes that don't exist yet because nobody's been able to make them. Flat heads, prostate-specific profiles, tentacle head anyone?
That's only possible with a modular 3D-printed platform.
The Bottom Line
Every time we get ready to use the M1, there's a moment of genuine anticipation — not just for the session, but for the choices. Intense prostate stimulation? Maximum movement? Tighter fit? Gentler sensation? Just going to take it? It doesn't matter, because you have a platform that can do all of it, and the ecosystem keeps growing.
This is the first probe we've been genuinely excited about from a personal use perspective. We think you will be too.
See how we compare to the current top estim manufacturers: