Ideal for use with Digital Deterrent, the Speco Technologies ASPC20W is a 6" PA horn speaker designed for message and alert systems as well as any other application where significant cost savings can be realized by not having a dedicated amplifier. The speaker is made from plastic and is completely weatherproof, allowing you to place it anywhere. The 8 Ohm powered speaker requires a 10-16V DC power supply (not included). A mounting bracket is included.