1.Adopt 3.5mm plug, solid and durable.
2.DC 5V to 12V alarm siren with 3.5mm plug connector.
3.The sound is 120 decibels, it's loud even at 5V DC.
4.Made of ABS plastic, wear resistance, impact resistance, heat resistance, low temperature resistance.
5.Can mount by sticker or screws,equipped with sticker on its bottom, very easy to install.