Click to expand Tap to zoom Northern Video - 20 Watt, Single Tone Siren - S20WSU by Nothern Video SKU S20WSU 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to List Specification Power: 20 Watt Tone: Yelp Voltage: 6~13.5 Volts DC Decibels: 115 dB (max) Current: 750~950 mA Dimensions [D x L x H]: Ф5.3 x 5.9 x 6.1 (in) Ф135 x 150 x 155 (mm) Weight: Weight 1.05lbs / 480g Weatherproof Rating: IP 55