Helix vs ElectroPebble vs 2B: which E-Stim Systems control box is right for you?
Picking an e-stim box is a bit like picking a car. Some people want simple, predictable, and easy to drive. Some want buttons, menus, and fine control. And some are quietly plotting how to hand the keys to a partner and let them do terrible (excellent) things.
In this guide, we’re comparing three of the most popular E-Stim Systems control boxes we stock at E-Stim Emporium:
- ElectroHelix (“Helix”)
- ElectroPebble (“Pebble”)
- 2B
We’ll cover what each one does well, where the compromises are, and who it tends to suit.
At a glance
Helix
Simple analogue control, single output, 5 modes, “grab it and play”.
Great as a first proper beginner-friendly e-stim control box.
ElectroPebble
The friendly all-rounder.
Two channels with a clever shared-ground design, 9 modes including audio, and loads of variety without getting fiddly.
2B
The serious one.
Two isolated channels, lots of modes, more power on tap, an LCD screen, and optional PC/Internet control.
Brilliant… if you actually want that level of capability.
Comparison table: specs & vibe
These are the things most people actually care about when choosing.
| Control box | Helix | ElectroPebble | 2B |
|---|---|---|---|
| Channels | 1 | 2 | 2 |
| Channel relationship | Single output | Shared ground / channel interaction | Fully isolated channels + join mode |
| Modes / programs | 5 (including Milk/Tease + Fire button mode) | 9 modes | 17 adjustable program modes |
| Audio features | No dedicated audio mode | Built-in microphone | Built-in mic + true stereo 3.5mm input |
| Controls | Analogue knobs + mode button | Analogue knobs + mode buttons + LED LifeLine | Digital LCD + buttons / knobs |
| Power | 9V PP3 battery | 9V PP3 battery | 9V PP3 battery or optional mains PSU |
| Best for | Beginners, simplicity lovers, no-menu people | Couples, variety seekers, easy dual-output play | Power users, tech nerds, long sessions, remote control |
| Price band | Lower / entry | Mid | Higher / premium |
The real differences, in plain English
1) Do you want one output or two?
Helix is a single-output. That doesn’t mean boring — it means focused. One circuit, one electrode setup at a time. That makes it ideal for newcomers, as keeping things simple makes the learning curve gentler.
ElectroPebble and 2B are dual-output boxes. You can stimulate two separate electrode setups at once… but the way they do it is completely different.
2) Shared ground vs isolated channels
The ElectroPebble uses a shared-ground design, allowing the two outputs to interact. E-Stim Systems describes it as being a bit like having built-in Triphase. In real use, that means you can sometimes move the sensation around between electrode points by adjusting the two level controls. It feels lively, responsive, and a bit cheeky.
The 2B has two completely isolated output channels with independent control. That’s the classic two-separate-circuits approach, and it matters if you want to run multiple bipolar electrodes at once while keeping everything cleanly separated.
3) Analogue simplicity vs digital depth
Helix and ElectroPebble are very much “knobs and go” boxes. They’re intuitive, tactile, and easy to get on with.
The 2B is a proper digital unit with an LCD screen and additional capabilities, including optional computer and Internet control. That opens doors, but it also means buying a box that may be more advanced than you actually need.
Helix: the “just play” box
The Helix is for people who want an e-stim unit that feels designed for hands-on play, not borrowed from a medical cupboard.
E-Stim Systems built the Helix as a successor to their classic Series 1: same simple, usable spirit, but more refined.
What it does well
- Simple stepless analogue controls
- 5 modes with enough variety to stay interesting
- Includes Flo, Pulse, Milk, Tease, and Fire Button mode
- Optional “Sport mode” for sharper, more intense output
- Quick battery swaps using a PP3 9V battery
- Small, grippy, wipe-clean, dungeon-practical design
What to be aware of
- Single output means one electrode circuit at a time
- You may outgrow it if you want more complex multi-point play
- No audio mode
Best for
- First-timers
- People who love tactile analogue control
- Anyone who wants immediate, no-fuss play
ElectroPebble: the sweet spot
The ElectroPebble is E-Stim Systems’ “almost everyone can use this” box — and that’s a compliment, not faint praise.
It’s ergonomic, easy to hold, and packed with features that make sense in real play rather than just looking sexy on a spec sheet.
Key features
- Dual channels with independent stepless level controls
- Shared-ground interaction between channels
- 9 programs: Pulse, Flo, Split, Bounce, Audio, Milk, Squeeze, Tease, and Torment
- Audio mode with built-in microphone
- LifeLine™ LED display
- Usually supplied as a ready-to-go kit
What it feels like in practice
- Run two electrode points and blend the sensation between them
- Create shifting hotspot effects by balancing the two channels
- Hand it to a partner and let them steer using just two knobs
Best for
- People who want two outputs without a steep learning curve
- Couples who enjoy interactive control
- Anyone who wants audio play without turning the bedroom into an IT department
2B: the powerhouse
The 2B has been around for a long time for a reason: it’s a proper flagship.
This is where E-Stim Systems really leans into the idea of a platform rather than just a toy. It has firmware, updates, an LCD screen, loads of program options, and room to grow into some very nerdy fun indeed.
What it does well
- Two fully isolated output channels
- 17 adjustable program modes
- Backlit LCD with built-in help prompts
- Low/high power settings are adjustable from 0–100%
- Optional mains power for longer sessions and more output
- Built-in mic plus true stereo audio input
- Optional Digital Link / Commander 3 / E-Stim Connect ecosystem
What to be aware of
- It is noticeably more powerful than the Helix or ElectroPebble
- That extra capability needs respect and sensible placement
- It can feel more like a serious tool than a casual pick-up-and-play box
Best for
- Experienced players
- People who want isolated channels
- Complex setups and longer sessions
- Tech-minded users who love deeper control
Which should you buy?
Choose the Helix if…
- You’re buying your first proper e-stim box
- You mostly play with one setup at a time
- You love analogue knobs and hate menu diving
Choose the ElectroPebble if…
- You want the best mix of value, variety, and ease of use
- You like the idea of two channels, but don’t specifically need full isolation
- You want Audio mode without turning play into a tech project
- You want a partner-friendly box that’s easy to drive in the moment
Choose the 2B if…
- You want maximum control and maximum headroom
- You need isolated channels for your preferred setups
- You enjoy firmware updates, remote control, and deeper configuration
- You want a box you can grow into for years
One last thing: electrodes & compatibility
Whichever box you choose, you’re not locking yourself into some weird proprietary ecosystem.
All E-Stim Emporium electrodes are compatible with the Helix, ElectroPebble, and 2B.