YASONG SLA-01Y 120dB Remote Control Siren, 500m/2000m Range, 25W, 1 Tone, IP65, LED Strobe Portable Alarms 31 miles in open areas

31 miles in open areas without wall obstruction

as the page shows both IP66 and IP65 information

This model works by remote control operation: after the siren is powered on

IP54 main unit and IP65 laser sensor for industrial environments

The YASONG SLA-900MY-2000 is a high-power wireless remote control alarm siren with a 0–130dB adjustable loud horn

YASONG SLA-01Y 120dB Remote Control Siren, 500m/2000m Range, 25W, 1 Tone, IP65, LED Strobe Portable Alarms 31 miles in open areasThe YASONG SLA 01Y is an outdoor wireless remote control alarm siren with a 120dB loud horn, LED strobe warning, and long distance remote control for outdoor safety and security alerts. This model stays in standby mode after power on and can be turned on or off by remote control. The remote control range is available in 500m and 2000m open area options, depending on the selected variant. 120dB loud horn for clear outdoor warning 500m 2000m remote