Wireless kinetic doorbell, RF433

Wireless kinetic RF433 doorbell. Energy is generated by pressing the mechanical button, so the call button does not require batteries. The kit includes an internal doorbell receiver with a European plug, which plugs directly into an electrical outlet.
Features:
The kinetic doorbell works without batteries: when you press the call button, the mechanical movement generates the energy needed to transmit the RF signal to the internal call receiver.
The call uses 433 MHz RF radio communication. The signal transmission distance is up to 100 m in open space and up to 30 m indoors.
The internal doorbell receiver is connected directly to a power outlet via a European AC plug and is paired with the outdoor call button via wireless RF connection. Jam No additional power adapter or wires are required.
You can choose from 37 melodies according to your individual needs. The receiver has melody selection, volume adjustment and pairing buttons, as well as a LED status indicator.
One call button can be linked to several internal receivers. One internal receiver supports up to 5 call buttons according to the default configuration. One call button can work with several internal calls.
The mechanical button is characterized by durability, its service life exceeds 200,000 clicks.
The call button can be installed using double-sided adhesive tape or screws.
The bell is suitable for residential buildings, apartments, offices, warehouses and other premises where a simple and reliable wireless doorbell is required.
Technical data:
Field call button:
Power supply: self-generated energy (without batteries).
RF frequency: 433 MHz.
Transmission current: lt;30 mA.
Transmission power: gt; +13 dBm.
Operating distance indoors: up to 30 m.
Operating distance in open space: up to 100 m.
Button actuation force: about 3 N.
Button service life: gt; 200,000 clicks.
Operating temperature: -20°C~+60°C.
Call button dimensions: 67x33x18 mm.
Weight: 29g.
Color: black.
Internal doorbell:
Power supply: AC 100-240 V, 50/60Hz.
Plug: European type.
RF frequency: 433 MHz.
Number of melodies: 37.
Sound level: gt; 50 dB, measured at a distance of 1 m.
Operating temperature: -10°C~+45°C.
Dimensions: 85x50x63 mm.
Weight: 53g.
Color: black.
The set includes:
Outdoor kinetic call button.
Indoor doorbell receiver.
Mounting parts.
User manual.
Warranty: 24 months