The Ajax DoubleButton is a wireless hold-up device that works with the Ajax Jeweller wireless alarm system to raise an alert in the event of an emergency such as robbery. It features two tight buttons and a plastic divider to protect against accidental presses. When pressed, it raises an alarm (hold-up event), transmitted to users and to the security company’s monitoring station. An alarm can be raised by pressing both buttons: one-time short or long press (more than 2 seconds). If only one of the buttons is pressed, the alarm signal is not transmitted.
The hold-up device transmits a signal to the hub via Jeweller—a two-way radio protocol communicating at a range of up to 1300 meters. A flashing LED verifies the successful delivery of the DoubleButton alarm. Jeweller encrypts the transmitted data and prevents device forgery. In the case of interference, the Ajax system switches to a free radio frequency, and when the air is jammed, it notifies users and a security company about the situation.
- Wireless hold-up device
- Both buttons need to be pressed to avoid accidental alarms
- Grade II
- Radio signal range of up to 1,300 m
- Alarm delivery confirmation
- AES encryption
- RF hopping
- Can be body worn or wall mounted
- IP55 rated body
- Works up to 5 years from battery
- Simple set up
|Classification||Wireless hold-up device|
|Compatibility||Operates with all Ajax hubs and range extenders with OS Malevich 2.10 and higher|
|False alarm prevention||Yes|
|Number of buttons||2|
|Alarm transmission||No longer than 0,15 sec|
Always active (does not require waking up to use)
|Jeweller radio technology||Communication range with a hub — up to 1300 m in an open area|
Radio frequency bands:
866.0 – 866.5 MHz
868.0 – 868.6 MHz
868.7 – 869.2 MHz
905.0 – 926.5 MHz
915.85 – 926.5 MHz
921.0 – 922.0 MHz
(Depends on the region of sale)
Self-adjusting RF output power — up to 20 mW
Block encryption based on AES algorithm
|Power supply||CR2032 battery, 3 V|
Up to 5 years
|Operating temperature range||From -10°C to +40°C|
|Permissible humidity||Up to 75%|
|Size||47 × 35 × 16 mm|
|Warranty||Replacement and repair within 24 months of the date of sale. Batteries are not covered under warranty.|
|Service life||10 years|
Pre-installed CR2032 battery
Quick Start Guide
|DoubleButton User Manual|
|Ajax support site|
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