Duplex Wireless Intercom System business Calling Device RT57

85% of 100
  • Clear sound quality and long range
  • Duplex mode: You can speak to another user if they are speaking at the same time.
  • 10 selectable channels, Features an enhanced anti-interference and can work with other walkie-talkies when with same frequencies and CTCSS code.
  • 5 selectable call tones
  • Can be applied with Family, Office, Outdoor Activity.
In stock
  • Buy 2 for $84.50 each and save 5%

Retevis RT57 Wireless business Calling Device Wireless Intercom System for Home or Office, Room to Room Intercom, Home Communication System


Hot Spot:
1. There is no need to wire or change current decoration. Reception is stable and performance reliable. With up-to-date digital encoding and decoding technology, every system owns its unique code that ensures there is no error between calling system.
2. Two-way communication but ordinary business beepers only establish communication between master station and extended set. Our new model is designed to satisfy prevailing market demand that an extension could not only communicate freely to master station but also to other extensions. A phone set as the terminal could be turned into the master for the group call as well as an extension for the reception of signals from other extension terminal.  It is able to be used for one-to-one calling and also one-to-many communications.
3. It could be connected to a wakie talkie for voice call.

1. Interconnection between 99 devices
2. Two-way communication
3. Making Announcement or one-way conference function
4. Incoming call display
5. Call tone for manual communication
6. Call tone for automatic communication
7. Backlight LCD
8. 5 selectable call tones 
9. 10 selectable channels
10. Calling walkie-talkie

Technical specification:







Frequency Range


Channel Spacing


Working Mode

Duplex Mode on Two Frequencies



Antenna Impedance


Operating Voltage


Operating temperature

- 20--+55℃

Operating current

< 600 mA

Standby current


Spurious emission

< -60 dB

Output Power

0.5 W

Channel Stability

±5 ppm

Modulation Sensitivity

2--20 mA

Available Sensitivity


Threshold of Squelch Sensitivity

< 0.2uV

Deep Quieting Sensitivity

< 3uV

Package includes

  • 1 x RT57 Wireless business Calling Device
  • 1 x Antenna
  • 1 x Power Adapter
  • 1 x User Manual
More Information
Model RT57
Compatible Products N/A
Other parameters N/A
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