Three precision sensors. No screen. No cellular. No subscription. The first generation of SafeStep is built around the minimum viable set of hardware needed to keep a child safe and a parent informed — with everything else on the roadmap.
Tap any sensor to expand full technical specifications
Gyroscope · Accelerometer · Magnetometer
"Your child always knows which way leads home."
Accuracy
±1° heading accuracy · <0.5° gyro drift per minute
Update Rate
50 Hz fused output · 100 Hz raw sensor polling
Power Draw
~3.2 mA active · ~0.9 mA low-power mode · <0.01 mA standby
BLE 5.0 · Proximity Engine · Instant Alerts
"An invisible leash that never breaks."
Accuracy
±0.5 m at 5 ft · ±1.2 m at 30 ft (open air)
Update Rate
100 ms advertising interval · 10 Hz RSSI polling
Power Draw
~1.8 mA advertising · ~0.6 mA connected idle · <0.01 mA deep sleep
Capacitive Moisture Sensor · Submersion Logic
"Pools, puddles, and ponds — Mia sees them all."
Accuracy
100% submersion detection · <2% false positive rate for sweat/rain
Update Rate
20 Hz continuous · interrupt-driven on threshold breach
Power Draw
~0.4 mA active sensing · ~0.02 mA standby · 0 mA when dry (interrupt-driven)
Every feature below is engineered, patented, and scheduled. Gen 1 ships now. Gen 2 and Gen 3 are already in hardware validation.
Target: 2026
Adults scan their fingerprint on the band to verify custody. Every handoff is logged with a biometric signature — no PINs, no passcodes that can be shared or guessed.
Optical PPG sensor tracks resting and active heart rate. Alerts fire if the child's heart rate spikes above age-adjusted thresholds — a potential stress or fear indicator.
Galvanic skin response measures emotional arousal. Combined with heart rate, it powers Mia's real-time emotional state detection — feeding directly into the Hanger Mia translator.
Altitude and depth estimation. Enhances water detection with submersion depth data, and enables indoor floor-level tracking in multi-story buildings.
Target: 2027
Ultra-wideband positioning for centimeter-level accuracy indoors. Combined with GPS outdoors, this gives parents a true real-time location — not a Bluetooth estimate.
Low-power wide-area radio for locations with no Bluetooth range — parks, beaches, large venues. No cellular subscription required. Range up to 2 km in open terrain.
Contactless payments built into the band. Parents set a daily spending limit and approved merchants. Kids get independence; parents get full transaction visibility.
Optical biosensors measure blood glucose through the skin. Parents track their child's blood sugar in real time — no finger pricks, no pain, no lancets.
The band physically locks to the child's wrist until a registered guardian's biometric is verified. Tamper-resistant clasp with embedded strain gauge — any forced removal triggers an immediate alert.
All sensor combinations, fusion algorithms, and custody-chain logging methods are covered under SafeStep's pending hardware patent. The Gen 2 and Gen 3 sensor additions are included in the patent expansion currently in review.
Battery Capacity
300 mAh LiPo
Rechargeable via magnetic USB-C
All Sensors Active
~5.4 mA total draw
LED Compass + BLE + Water Detection
Estimated Runtime
~55 hours
Continuous all-sensor operation
Standby (BLE only)
~0.6 mA
Proximity tether active, sensors sleeping
Standby Runtime
~500 hours
~20 days on a single charge
Charge Time
~90 minutes
0 → 100% via magnetic dock