Solutions
Health · Assisted living
4G Elderly SOS Pendant
Standalone cellular emergency device — no Wi-Fi, no paired phone.
Standby
7 days
Fall accuracy
>97%
False positive
<2.5%
Target BOM
$24–$32
01 / Where it ships
One-button SOS, automatic fall detection, two-way voice, GNSS — all over 4G.
01
Independent senior at home
Worn as a pendant or wristband; fall triggers SOS even if unconscious.
02
Outdoor walk & garden
GNSS plus cell-ID fallback locates the wearer within 20 m outdoors.
03
Care home perimeter
Geofence the property; staff alerted if a resident with dementia wanders out.
02 / System architecture
Sensors, MCU, and connectivity — co-designed end-to-end.
Architecture · block diagramReference
BLOCK-307RYXAVO · REV-A
03 / Key selections
Production-grade parts. Not a generic reference board.
| Area | Recommended |
|---|---|
| Cellular + VoLTE | Fibocom LE271-GL |
| MCU | GD32L233 |
| IMU | ST LIS2DH12 |
| Audio | Knowles SPH0641 + AW87xxx amp |
| Charger | POGO + magnetic cradle |
04 / Specifications
Detailed specifications.
Cellular
4G LTE Cat.1 bis with VoLTE
Positioning
GNSS + Cell-ID fallback + Wi-Fi scan
Fall detection
On-device classifier, configurable sensitivity
Audio
Hands-free, AEC, 90 dB SPL
Battery
550 mAh Li-Po, magnetic charge
Standby
Up to 7 days
IP rating
IP67 (shower-safe)
Dimensions
48 × 36 × 14 mm, 28 g
05 / Customization
Fork the design. We tailor it.
Anything below can be configured per program. Tell us what changes and we'll come back with a delta BOM and timeline.
- Pendant / wrist / belt-clip form factor
- Custom monitoring center integration (URC, AVS)
- Caregiver app + SMS forwarding
- Multi-language voice prompts
- Optional medication reminder
- Carrier-locked or unlocked SIM
06 / MOQ & lead time
Production terms.
- MOQ
- 500 units
- Sample lead time
- 12 working days
- Mass production
- 35–40 days from PO
- Payment terms
- 30% T/T deposit, 70% before shipment
07 / Certifications
Compliance scope.
- CE
- FCC
- RED 3.3
- RoHS
- REACH
- Bluetooth SIG
- PTCRB / GCF
- IP67