ขาย 120dB ระบบเตือนภัยไซเรนในร่มแบบใช้สายขนาดมินิสําหรับรักษาความปลอดภัยภายในบ้าน ราคาที่ดีที่สุด

♔✽✽120dB Sound Alarm System Indoor Siren Wired Mini Horn Siren For Home Security Features: It is about 120 decibels unit at full volume, providing very loudly sound. This piercing, plug-in siren can be plugged into your keypad/Console. It works with your system, responding to signals from an alerted Keypad/Console. Strong, durable, and long service life. Compact, lightweight and portable. Description: Easy to install. Easy to use. These trumpets can produce powerful sound as loud, making it easy to noted. Specifications: Color: black&red&white Material: Plastic Size: diameter 54mm, height 48mm Rated voltage: 12V DC Sound index: 120dB Sound frequency: 3.8KH2+10% Transmit speed: 3H2 increase or discrease 10% Package includes: 1 x Indoor Siren