S-Pro vs Sand Shark
| Quest S-Pro | Tesoro Sand Shark | |
|---|---|---|
| Technology | VLF | PI |
| Frequency | 13 kHz | N/A |
| Frequency Type | — | — |
| Frequency Tech | Single Frequency | Micro-processor PI |
| Weight | 1.1 kg | 2.0 kg |
| Price | — | — |
| Best For | Relics, Park, Fields | Diving, Salt Water Beach |
| Waterproof | Yes | Yes |