Product description:
The human is simple, flexible, wireless installation design, no need to turn to professional or installation, free iron wall, obviate installation and trouble spending and save money.
Does not affect the decoration, beautiful.The move is installed.

The use of electronic buck with insurance system, away from dangerous transformer short-circuit ignition (because of the long-term work, fever easily produce), can ensure safety.
To with Europe type style, delicate and cabinet of streamline of streamlined design, ultra-small form, beautiful and easy, grace for your home.
The built-in stereo speakers, make sound clear, sweet, especially suitable for household, office buildings, factories, tourism and other places to use
Strong anti-jamming capability, repeat rate is less than one over one hundred thousand.
The launch of the industry innovation button, the battery LED indicator, let you whether need to replace the battery, be clear at a glance.
Wide range of USES, in addition to the used as ordinary doorbell, more can be used as a contact, pager, patient care, emergency notification and other special purposes.

Product Features

• Magnetic sensor switch detects entry protecting home or office
• INCLUDED Three 1.5V button cell batteries
• Easy tool-free installation to window or door; Mounted using double-sided adhesive tape (included)
• 90 DP plus @ 3 ft. sound level
• sensors for two windows or doors, if you also want “chime” function, please buy this one: https://www.amazon.com/dp/B01EDQFDO4/ref=olp_product_details?_encoding=UTF8&me=