We bleeves this is new old stock from Orevox Corp, mostly because of the the ’70s style of the case. This 12VDC siren is rated for 110dB and draws up to 600mA while emitting a steady or “yelp” tone (we’d call it more of a warble, actually). Has a 3” Mylar cone speaker that ought to be weather-tolerant. Housing is just under 4” square x 2” thick in a cream plastic with 5/32” mounting holes near the corners. Includes (3) 9” leads and a wiring diagram.

From Brinks®, this personal security alarm has an IR sensor that will trip a 120dB siren or door chime when anyone enters the sensor’s 100-degree x 12-foot range. Measures 4-5/8" x 2-3/8" x 1-3/4" in a white plastic housing with a 1-3/4" x 1-3/8" lens. Mounts via a 5/32” keyed slot or an included 1” ball-and-socket bracket. Could also be set on a dresser or desk in a hotel room. You add (4) “AAA” batteries.