SlimeVR Butterfly Trackers
Open-source inertial full-body VR tracking
- Battery / power
- 90 mAh ↗
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At a glance
The differences that matter
Tundra Tracker
SteamVR tracking of body movement
Keep in mind Specifications are sourced claims, not our independent performance measurement.
Published specifications and documented constraints. See the full comparison below for prices and sources.
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| Haptics & body trackingAdd a model |  |  |
|---|---|---|
| Prices · all markets | $279 USD≈ €249 EURECB 2026-10-13Global · Announced price · Preorder 1 offer records & sources$279 USD≈ €249 EURECB 2026-10-13 Global · Announced price PreorderCrowd Supply (official SlimeVR campaign) Core Set Bundle: six trackers, straps and dongle Official live campaign ordering section estimates Jan 31, 2027 dispatch. This is an estimate, not completed delivery. Shipping listed separately. Original source market label: International.Check merchant offer ↗Price source ↗ Checked 2026-10-12 | $130 USD≈ €116 EURECB 2026-10-13US · Store price · Stock and delivery not verified 1 offer records & sources$130 USD≈ €116 EURECB 2026-10-13 US · Store price Stock and delivery not verifiedTundra Labs Single tracker with threaded baseplate and one SteamVR dongle Maker single-tracker listing displays USD130 regular price and Sold Out. Zero-dollar sale template text is not a free-device offer.Check merchant offer ↗Price source ↗ Checked 2026-10-12 |
| Designed for | Open-source inertial full-body VR tracking ↗ | SteamVR tracking of body movement ↗ |
| Form factor | Body-worn Butterfly tracker set ↗ | Small strap- or threaded-mount body tracker ↗ |
| Tracking | Inertial full-body tracking ↗ | Not verified |
| Battery / power | 90 mAh ↗ | Not verified |
| Charging | USB-C or optional charging dock ↗ | USB-C ↗ |
| Weight | Less than 10 g per tracker ↗ | Not verified |
| Software | Open-source SlimeVR ecosystem ↗ | Not verified |
| Sales | Official shop preorder ↗ | Not applicable to this category |
| Dimensions | 56 × 35 × 7 mm ↗ | Not applicable to this category |
| Runtime | Up to 48 hours ↗ | Nine hours average stated by maker ↗ |
| Connectivity | Custom 2.4 GHz ESB radio with dedicated dongle; no Wi-Fi required ↗ | Not applicable to this category |
| Refresh rate | 100-200 Hz target; not finalized ↗ | Not applicable to this category |
| Firmware | Wireless OTA updates ↗ | Not applicable to this category |
| Optical Sensors | Not applicable to this category | 18 sensors; must remain uncovered ↗ |
| Mounts | Not applicable to this category | Quarter-inch female threaded plate or less-than-one-inch strap-loop plate ↗ |
| Receivers | Not applicable to this category | Tundra Super Wireless Dongles, compatible VIVE dongles and listed SteamVR receiver options ↗ |
| Base Stations | Not applicable to this category | SteamVR1.0/2.0; VIVE and Valve Index compatible stations ↗ |
| Expansion | Not applicable to this category | Separate I/O expansion board for touchpad, trigger, grip, menu and haptic signals ↗ |
| Availability | Preorder; campaign shows manufacturer prototype photos. Production enclosure and colour may change. | Maker single-tracker listing displays USD130 regular price and Sold Out. Zero-dollar sale template text is not a free-device offer. |
| Important context |
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| Editorial pick & release | No editorial ranking recorded | #7 · Our Top 10 Haptics & body trackingRelease date not verifiedFirst retail release |
| Evidence | Manufacturer source Checked 2026-10-12 | Manufacturer source Checked 2026-10-13 |
Battery claims use different conditions and are not a controlled benchmark. “Not verified” is an evidence gap, not a missing feature. Prices are dated regional snapshots. Deposits, bundles and historical launch prices are labelled. Brightness measurement methods and battery workloads vary by manufacturer.