BT Series SOS Emergency Button – One Press, Instant Help
Choose BT400A (WiFi) for direct cloud connection, or BT500B (Zigbee) for seamless smart home integration. Both feature ultra-low power consumption, rechargeable battery, and instant APP alerts. The perfect safety companion for seniors, patients, and children.
Instant SOS Activation – One press sends immediate alarm to family members via Tuya APP
Multi-Person Notification – Alert multiple contacts simultaneously
Remote Alerts – Receive notifications even when away from home
Standby Current – ≤10μA for extended battery life
Alarm Current – ≤15mA during activation
Low Voltage Warning – Alert at ≤2.6V to remind charging
Built-in Lithium Battery – 3V rechargeable, no battery replacement needed
Long-Lasting – Optimized power management for months of use
Wiring-Free – No complex installation required
Compact Size – 70×70×33mm, lightweight at 34g
Portable Design – Can be carried, placed on desk, or mounted on wall
Temperature Range – -10°C to +50°C
Humidity Resistance – Up to 95% RH
Senior care / Elderly safety
Medical alert for chronic conditions
Pregnancy care
Hospital / Nursing home
Child safety
Bed care for patients
| Feature | BT400A (WiFi) | BT500B (Zigbee) |
|---|---|---|
| Connectivity | WiFi 2.4GHz IEEE 802.11 b/g/n | Zigbee 3.0 |
| Network Requirements | Direct connection to WiFi router | Zigbee gateway / hub required |
| APP Integration | Tuya / Smart Life (WiFi) | Tuya / Smart Life (via gateway) |
| Voice Assistant | Alexa, Google Home (via Tuya) | Alexa, Google Home (via Tuya) |
| Standby Current | ≤10μA | ≤10μA |
| Alarm Current | ≤15mA | ≤15mA |
| Low Voltage Alert | ≤2.6V | ≤2.6V |
| Battery Type | Rechargeable lithium (3V) | Rechargeable lithium (3V) |
| Dimensions | 70 × 70 × 33mm | 70 × 70 × 33mm |
| Net Weight | 34g | 34g |
| Package Type | Color box | Color box |
| Best For | Homes with WiFi only | Existing Zigbee smart home systems |
| Parameter | BT400A (WiFi) | BT500B (Zigbee) |
|---|---|---|
| Product Name | WiFi SOS Emergency Button | Zigbee SOS Emergency Button |
| Model | BT400A | BT500B |
| Working Voltage | 3V (rechargeable lithium) | 3V (rechargeable lithium) |
| Battery Type | Rechargeable lithium battery | Rechargeable lithium battery |
| Static Current | ≤10μA | ≤10μA |
| Alarm Current | ≤15mA | ≤15mA |
| Low Voltage Alert | ≤2.6V | ≤2.6V |
| Communication Protocol | WiFi 2.4GHz (802.11 b/g/n) | Zigbee 3.0 |
| Operating Temperature | -10℃ ~ +50℃ | -10℃ ~ +50℃ |
| Operating Humidity | ≤95% RH | ≤95% RH |
| Product Dimensions | 70 × 70 × 33mm | 70 × 70 × 33mm |
| Net Weight | 34g | 34g |
| Package Type | Color box | Color box |
| Certifications | CE, RoHS | CE, RoHS |
Package Includes (Both Models):
1 × SOS Emergency Button
1 × USB charging cable (or appropriate charger)
1 × User manual
1 × Mounting accessories (optional)
