The Sabre Motion Sensor Alarm with Keypad (Model# HS-MSA) is a wireless indoor alarm that operates on batteries with a voltage of 3V. It features a 120dB operating sound rating and a 6-meter operating range. This alarm is designed with a white color and is compatible with Amazon Alexa for smart home integration. The keypad allows for easy operation, while the surveillance technology is analog. Perfect for home security, this motion sensor alarm from H&S is a reliable choice for keeping your living space safe and secure.