| Business | Phone |
| Eastland Alarms 2 Theresa Ln, Harrison 10528 | (914) 835-5037 |
| Adtron Systems Inc 9 Adelphi Ave, Harrison 10528 | (914) 835-5913 |
| Arcuri Alarm Systems Inc 105 Calvert St, Harrison 10528 | (914) 381-5747 |
| Matrix Security Systems 4 Bellain Ave, Harrison 10528 | (914) 835-4070 |