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
HTC VIVE Tracker (3.0)
SteamVR body and prop movement capture
- Connection & compatibility
- Included dongle, USB-C dongle cradle and USB-C cable ↗
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 | Price not verified 0 offer records & sourcesNo verified price in this audit. |
| Designed for | Open-source inertial full-body VR tracking ↗ | SteamVR body and prop movement capture ↗ |
| Form factor | Body-worn Butterfly tracker set ↗ | Body-mounted optical-base-station tracker ↗ |
| Tracking | Inertial full-body tracking ↗ | SteamVR Base Station1.0 and2.0 support ↗ |
| Battery / power | 90 mAh ↗ | Not verified |
| Charging | USB-C or optional charging dock ↗ | Not verified |
| Weight | Less than 10 g per tracker ↗ | 75 g ↗ |
| Connection & compatibility | Not verified | Included dongle, USB-C dongle cradle and USB-C cable ↗ |
| Software | Open-source SlimeVR ecosystem ↗ | Not verified |
| Sales | Official shop preorder ↗ | Not applicable to this category |
| Dimensions | 56 × 35 × 7 mm ↗ | 70.9 x 79 x 44.1 mm ↗ |
| Runtime | Up to 48 hours ↗ | Up to 7.5 hours ↗ |
| 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 |
| Field Of View | Not applicable to this category | 240 degrees ↗ |
| Body Tracking | Not applicable to this category | Maker recommends three or more trackers for full-body use ↗ |
| Requirements | Not applicable to this category | Compatible base stations, software and free PC USB connections ↗ |
| Availability | Preorder; campaign shows manufacturer prototype photos. Production enclosure and colour may change. | Current manufacturer hardware page verified. Base stations and body straps are additional hardware; no exact single-tracker checkout price verified. |
| Important context |
| |
| Editorial pick & release | No editorial ranking recorded | #3 · 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.