Powerful 120dB signal horn alerts employees to emergencies and can be heard over machinery. Self-powered, ozone-safe aerosol can requires no batteries or electrical power. Wall-mount safety yellow steel box measures 4-1/2"w x 10-1/4"h x 5-1/2"d. Pull emergency handle for immediate access. Includes padlock and key for tamper protection. Replacement aerosol can for horn sold separately. emalst Alarm Station C26074$173.30 Replacement Can C26075$27.80 All in-stock orders placed by 6:00 p.m. EST ship out the same day! Don't see what you are looking for? Need help placing your order? Call our helpful Customer Service Representatives Monday - Friday 7:00 a.m. - 9:00 p.m. EST at 1-800-521-7000, fax us 24 hours a day at 1-800-336-3707 or e-mail us at teamca@champion-america.com