Philippines

Simple, flexible wireless installation design, avoid the installation of trouble and expenses, beautiful.
Transmitter: 23a 12V (including small battery)
Receiver: 2 * 1.5V (2 batteries of No.7) to be provided by the buyer
Usage: after the battery is installed, if you want to select a ring tone, please press the select tone button on the receiver to change the ring tone each time.
Installation use: transmitter (key): deliver a 12v23a small battery. To install the battery, pry the back cover with a slotted screwdriver.
The back cover has screw holes which can be fixed on the wall.