HB brand solar power wireless perimeter security sensor and panic button, door sensor wireless receiver. Plug-in alarm bell.
4 adjustable volume levels.
35 optional classic melodies
Indicator light will flash for several seconds when the sensor is activated.
Sounds for several seconds when the sensor is activated.
Can choose different melody for different sensor.
Power supply
AC110V -220V
Working current: Static current 20mA, Alarm current 300mA
wireless frequeny: 433MHz FSK+FHSS
https://www.vedardalarm.com/alarm-bell-for-wireless-security-driveway-door-sensor-p-234