I bought this as an intruder alarm connected to a SmartThings security system. no on/off switch; I plugged it in and hooked it up to a SmartThings switch to get it working (the two components together were cheaper than a Z-Wave/Zigbee siren). The siren was moderately loud and had a constant pitch. It sounded more like a whistle than a siren. After all, I used it as an alarm clock more than anything else. Stops working after 3 weeks of use. I would recommend buying something else unless low cost is a priority and you only need it for temporary use.
WETEN USB перезаряжаемый брелок для самообороны, сигнализация для женщин - водонепроницаемая, 130 дБ, тревожная кнопка, сирена, свисток со светодиодной подсветкой, брелок для безопасного звукового оповещения, черный
14 Review
Self Defense Personal Alarm Keychain For Women – USB Rechargeable Waterproof 130 DB Security Panic Button Siren Whistle With LED Light – Safety Sound Alert Device Key Chain By WETEN (Blue)
20 Review
2 Pack 130 DB Rechargeable Self Defense Keychain Alarm - Emergency Personal Siren With LED Light For Women, Kids, Elderly & Joggers By WETEN (Black&White)
12 Review
WETEN Safety Siren: Personal Protection For Women - 2 Pack Self Defense W/ Flashlight & 130DB Loud Alarm
29 Review
Effortlessly Navigate Your Laptop Or Desktop With The Perixx PERIPAD-501 Wired USB Touchpad
27 Review
12 Months Warranty HP ProBook 440 G2 450 G2 TPN Q139-Q143 Battery Replacement - VI04 756743-001, 756745-001, 756479-421 HSTNN-DB6K HSTNN-LB6K
38 Review
Enhance Your Network Connection With Dingsun RJ45 Coupler - Compatible With Cat5, Cat5E, Cat6, And Cat7 Ethernet Cables (Black 10 Pcs)
35 Review
HUANUO Adjustable Laptop Stand Riser For Desk - Fits Up To 15.6 Inch Notebook, Mesh Ventilated Cooling With 8 Tilt Levels For Improved Airflow & Ergonomics
29 Review