The SATEL APB-200 wireless alarm button activates an alarm and supports remote control of building automation systems. It features two-way radio communication in the 868.0–868.6 MHz frequency band, AES encryption, automatic channel selection, signal indication, and protection against interference and tampering. It supports remote configuration and firmware updates, and features an LED indicator and battery status monitoring.

• Range: up to 2,000 m with ACU-220 and up to 1,200 m with ACU-280 in open space
• Use: Indoor
• Power supply: 1 × CR14250 3 V battery
• Current consumption: 18 mA maximum, 55 μA in standby
• Battery life: approximately 2 years
• Operating temperature: -10 °C to 55 °C
• Permissible relative humidity: 93% ± 3%
• Dimensions: Ø 97 × 29 mm
• Compatibility: ACU-220, ACU-280, and ARU-200
• Conformity certification: CE