The biggest advantage is: no wiring or batteries, no need to plug in the outdoor pushbutton, just plug in the indoor part!

The wireless bell switch operates on the dynamo principle. No external power source is required to operate the push-button switch. The electrical current required for operation is generated by the dynamo in the switch.
Thanks to the innovative KINETIC battery- and wireless technology, you don't need a battery to operate the product.

• With two receivers for greater efficiency
• 38 different melodies, easily selectable on the receiver
• Easy to install and does not change the interior decoration of the room
• 3-way adjustable volume on the receiver
• Low power consumption
• Recommended for home, office buildings and shops

Properties:
• Frequency: 433 MHz +/- 1 MHz
• Ringer power supply: AC 200-240V
• Button Power: Self-powered
• Protection: IP44 (outdoor)
• Range: up to 100 m