SA818 is a cost-effective integrate professional walkie talkie module, it comes with built-in high performance microcontroller, narrow band RF transceiver IC and RF power amplifier,SA818 offer standard UART interface, which easy to configure the related parameters and control the
TX/RX function, Users only need to add external audio amplifier, microphone and speaker, then it becomes a professional walkie talkie, Simplified interface and Ultra small size make this module widely used in various applications and conveniently embedded into various handheld
Features
UHF band frequency: 400~480 MHZ
VHF band frequency: 134~174 MHZ
Tx and Rx frequency, Tx and Rx CTCSS,
CDCSS can be set alone.
Band width 12.5 / 25 KHz
Output power up to 1W
Distance up to 4-5km in open area
Sensitivity：-124 dBm
High-integrated, Small Size
38 CTCSS
166 CDCSS
8 level squelch
8 adjustable volume
High/ low power is optional（500mW-1W）
Wide range of working voltage 3.3-5.5 V
Built-in EEPROM，data saved even powered off
1 ppm KDS TCXO crystal, Stable performance
Application
small walkie talkie
Invisible intercom system
audio surveillance system
Outdoor Sport products
building community security system
Typical Application Schematic
Pinout definitio
Mechanism Dimension
