Feature:1. This multi-wire manual alarm button is suitable for sound and light alarms when a fire occurs.2. Conventional manual call point, and it is operated by advanced MCU expert algorithm software.3. Press and then pull the handle down to activate the normal alarm open control.4. Behind the tilting position, the word "ACTIVE" will appear yellow at the top, and the handle portion will protrude from the bottom of the sign.5. Convenient to operate, durable in use, and it can remind people to escape the fire.Specification:Condition: Item Type: Fire Alarm Button Color: As the Picture ShowsOperating Voltage Range: DC 9-28VAlarm Resistance: 470Ohm / 1WOperating Humidity Range: Relative Humidity 10%-93%, no CondensationOperating Temperature Range: -10C-50C (14F - 122F)Package List:1 x Fire Alarm Button 2 x Key 1 x Instruction Manual Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.