Check the listing for details. Ajax wireless indoor Home Siren. Color: White, Condition: New. Listed at 62.99 USD. Product Overview A wireless indoor siren for the Ajax system with adjustable volume. Main Features * Adjustable volume: from 81 dB to 105 dB * Delay and security mode changing indication * External LED connector * Remote control and setup via the app * Adjustable alarm duration: from 3 to 180 s * Door opening notifications * Effortless installation and replacement * Connecting via QR code