Alpha WPT504 Wireless Pendant Transmitter with Wrist Band
- Fully supervised wireless 900MHz transmitter
- Water-Resistant (to IP67 standard)
- Large alarm button
- Low battery warning before battery depletion
- Vibration and blinking red LED for call assurance

Alpha WPT504 Wireless Pendant Transmitter with Wrist Band
The WPT504 from Alpha is a wireless pendant wrist band, water-resistant type that uses a BA004 replacement 3V lithium battery. This wristband pendant features an impressive range and reliability of 900 MHz in a compact, water-resistant design. Users can confidently wear the pendant in the shower, under the rain, or in any environment with the potential for splashes or brief submersion.
The single-button design allows for "press and one second hold" activation, making it extremely user-friendly while minimizing false alarms. Upon activation, the WPT504 vibrates briefly and its red LED blinks rapidly for five seconds, followed by a slow blink until the alarm is cleared. Users can clear alarms using the ACC500K Alarm Clearance Card or through a sequence of button presses.
Features
- Fully supervised wireless 900MHz transmitter: Ensures high reliability and performance in communication.
- Water-resistant (to IP67 standard): Suitable for use in damp environments such as under the shower or during rain.
- Large alarm button: Designed for easy accessibility and quick activation in emergencies.
- Low battery warning before depletion: Alerts users in advance to avoid power loss during critical moments.
- Vibration and blinking red LED for call assurance: Provides users with clear confirmation of alarm activation.
- Field-replaceable, 3V lithium battery (model BA004): Simplifies maintenance and prolongs usability without professional help.
- 60% smaller and lighter than previous pendants: Enhances comfort and wearability without sacrificing functionality.
Alpha WPT504 Detailed Specifications
| Feature | Details |
| Wireless Frequency | 900 MHz |
| Water Resistance | IP67 |
| Activation Method | Single-button press |
| Battery Type | 3V lithium (BA004) |
| Dimensions | 60% smaller than previous models |
| Alarm Features | Vibration and LED feedback |




