Dangerous Things NExT
Experimental implanted electronic identification or secure-element hardware
Keep in mind Manufacturer states its finished implants are not government-certified for implantation or use inside the human body.
Compare wearables
Compare up to 10 devices across categories. Keep the purpose and the source beside the numbers.
Search & choose modelsAdd models to your comparison
Build your comparison
2 / 10 models676 models available. Showing nine - search to narrow the list.
Comparison settingsMarket, sorting & differences
How price order works
Lowest recorded store prices take priority over announced or launch prices, within the selected source market. Currencies use the dated EUR reference rates. Deposits and recurring charges are excluded from price order; missing prices stay last. Original price records remain visible.
At a glance
The differences that matter
VivoKey Spark 2
Experimental implanted electronic identification or secure-element hardware
Keep in mind Manufacturer states its finished implants are not government-certified for implantation or use inside the human body.
Published specifications and documented constraints. See the full comparison below for prices and sources.
Scroll across the table to compare every model
| Frontier & researchAdd a model |  |  |
|---|---|---|
| Prices · all markets | $89.99 USD≈ €80 EURECB 2026-10-13US · Store price · Stock and delivery not verified 1 offer records & sources$89.99 USD≈ €80 EURECB 2026-10-13 US · Store price Stock and delivery not verifiedDangerous Things Dangerous Things NExT hardware Manufacturer US product price for the implant configuration without reader/programmer add-ons. Professional placement cost not included.Check merchant offer ↗Price source ↗ Checked 2026-10-12 | $50 USD≈ €45 EURECB 2026-10-13US · Store price · Stock and delivery not verified 1 offer records & sources$50 USD≈ €45 EURECB 2026-10-13 US · Store price Stock and delivery not verifiedVivoKey VivoKey Spark 2 hardware Manufacturer US product price for the implant configuration without reader/programmer add-ons. Professional placement cost not included.Check merchant offer ↗Price source ↗ Checked 2026-10-12 |
| Designed for | Experimental implanted electronic identification or secure-element hardware ↗ | Experimental implanted electronic identification or secure-element hardware ↗ |
| Form factor | Subdermal electronic transponder ↗ | Subdermal electronic transponder ↗ |
| Chips | NTAG216 NFC and T5577 RFID ↗ | Not applicable to this category |
| Frequencies | 13.56 MHz and125 kHz ↗ | Not applicable to this category |
| Nfc Standard | ISO14443A ↗ | ISO14443A / NFC Type4 ↗ |
| Dimensions | 2.1x15 mm ↗ | 2.1x14 mm ↗ |
| Construction | Cylindrical bioglass encapsulation ↗ | Cylindrical glass package ↗ |
| Rfid Configuration | Preprogrammed EM41xx40-bit ID ↗ | Not applicable to this category |
| Nfc Memory | 880 bytes user data ↗ | Not applicable to this category |
| Operating frequency | Not applicable to this category | 13.56 MHz ↗ |
| Cryptography | Not applicable to this category | AES128 challenge-response ↗ |
| Data Storage | Not applicable to this category | No general-purpose user-data storage ↗ |
| Function | Not applicable to this category | Cryptographic digital-identity authentication ↗ |
| Availability | Manufacturer US product price for the implant configuration without reader/programmer add-ons. Professional placement cost not included. | Manufacturer US product price for the implant configuration without reader/programmer add-ons. Professional placement cost not included. |
| Important context |
|
|
| Editorial pick & release | No editorial ranking recorded | No editorial ranking recorded |
| Evidence | Manufacturer source Checked 2026-10-13 | 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.