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.
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The differences that matter
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.
Published specifications and documented constraints. See the full comparison below for prices and sources.
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| Frontier & researchAdd a model |  |  |
|---|---|---|
| Prices · all markets | $50 USD≈ €45 EURECB 2026-10-12US · Store price · Stock and delivery not verified 1 offer records & sources$50 USD≈ €45 EURECB 2026-10-12 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 | $89.99 USD≈ €80 EURECB 2026-10-12US · Store price · Stock and delivery not verified 1 offer records & sources$89.99 USD≈ €80 EURECB 2026-10-12 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 |
| 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 ↗ |
| Operating frequency | 13.56 MHz ↗ | Not applicable to this category |
| Nfc Standard | ISO14443A / NFC Type4 ↗ | ISO14443A ↗ |
| Dimensions | 2.1x14 mm ↗ | 2.1x15 mm ↗ |
| Construction | Cylindrical glass package ↗ | Cylindrical bioglass encapsulation ↗ |
| Cryptography | AES128 challenge-response ↗ | Not applicable to this category |
| Data Storage | No general-purpose user-data storage ↗ | Not applicable to this category |
| Function | Cryptographic digital-identity authentication ↗ | Not applicable to this category |
| Chips | Not applicable to this category | NTAG216 NFC and T5577 RFID ↗ |
| Frequencies | Not applicable to this category | 13.56 MHz and125 kHz ↗ |
| Rfid Configuration | Not applicable to this category | Preprogrammed EM41xx40-bit ID ↗ |
| Nfc Memory | Not applicable to this category | 880 bytes user data ↗ |
| 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. |
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| 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.