Part Number 990-6740-003 4 Line Removable Sonalert Mhl in stock with ready to ship. Get an instant quote for Honeywell Inc part number 990-6740-003 by filling form below with your desired order quantity, targeted price and the expected order-fulfilment date. Get instant quote for 990-6740-003. Our dedicated account manager will get back to you within 15 minutes.