Wired plastic materials, sturdy and durable, heat-resistant, moisture-proof, shock-proof, anti-seismic. Single tone circuit design. Large noise output and low voltage, safe to use. Red wire should be connected to positive electrode, black wire should be connected to negative electrode. With strong iron bracket for fixing, firm and convenient. Ideal for outdoor security systems and interiors. You can easily install it in the vehicle or at home. It is also ideal for industrial use. Shell Material: Plastic. Rated Working Voltage: DC 12V. Rated Working Current: 750mA. Operating voltage range: DC 6~15V. Output pressure: 110dB/m (at 12V DC, 30m distance). Continuous working period: 120min (at DC 12V). Working temperature: -20C to +60C. DC impedance of voice coil: 60.5. Tone: single tone (IC sound source). Size: approx. 4 x 4.6 x 6cm / 1.6 x 1.8 x 2.4inch. Quantity: 1 piece. Package Included: 1 x Electronic Wired Alarm Siren for security system.