How we use the kitchen calling system:

After setting the display receiver and the keypad, they could work together. 

Press any number on the keypad, the display receiver could receive signal, show and broardcast the number, such as, 03 take meal or 03 call, they could be used in kitchens.

CTK205 Touchable Keypad Transmitter Specifications:

Model: CTK205

Keypad Dimension: 152*96*31mm

Decoding: Infrared pair code

Color : Black

Transmission Distance:300-500 meters

Keyboard Type: IP32

Frequency: 433.92mhz

Plug: AU, EU, UK, US standard plug

CTM368 Functional Display Receiver Specification:

Size: 205mm*140mm*30mm

Power supply: DC 12V 1A

Language: English

Capacity: 1280 pcs of call buttons

Working frequency: 315MHZ, 433.92MHZ

Receiving sensitivity: ≥-110dBm

Material: ABS high-strength plastic

Color: Black

Display digits: 2 or 3 or 4 digits optional

Plug: AU, EU, UK, US standard plug