SA828 All in One Walkie Talkie Modules 3500m ~ 5000m Long Range Distance Talkie Walkie

SA818 high-integrated Embedded walkie talkie module
SA818 is a low cost and high performance integrated walkie talkie module. This module is the 2nd generation of the walkie talkie module and the   upgraded version of SA808.SA818 comes with built-in high performance microcontroller, narrow band rf transceiver and standard UART interface. It is easy to use. Users only need to add external audio amplifier, microphone and speaker, then it becomes a professional walkie talkie with 1W output. In open area, it can easily achieve 3.5-5Km communication distance. Simplified interface and ultra small size make this module widely used in various applications and conveniently embedded into various handheld devices.
There are two frequency bands of SA818: SA818-U and SA818-V. The only difference is the frequency range. The others are same, including module size, interface, software protocol, etc. The two modules' frequency ranges are:
SA818-U:  U band,     400 -- 480MHz
SA818-V:  V band,  134 -- 174MHz


* Frequency range:
SA818-U:  400 ~ 480 MHz (UHF)
SA818-V :  134~174MHZ (VHF)
* Tx and Rx frequency, Tx andRxCTCSS,CDCSS can be set alone.
* Band width 12.5/25KHz
* Output power up to 1 w
* Transmission distance up to 3.5 to 5 kminOpen area
* sensitivity: - 124 DBM
* small size
* Built-in EEPROM, data kept unchanged   even powered off
* 38 CTCSS
* 166 CDCSS
* 8 level squelch
* 8 adjustable volume
* high/ low power is optional (500 mw)-1w
* wide range of working voltage  3.3 to 5.5 V
* 1 ppm KDS TCXO crystal

Application:
* small walkie talkie
* Invisible intercom system
* Sport products
* building community security system
* audio surveillance system