<div class="detailmodule_html"><div class="detail-desc-decorate-richtext"><p>Features: <br/>1. This SA818S intercom module is equipped with a high-speed microcontroller, high-performance RF transceiver chip, and RF power amplifier, making it a cost-effective integrated professional intercom module. <br/>2. The simplified interface and ultra small size make this module widely applicable and easy to embed into various handheld devices. <br/>3. The SA818S walkie talkie module has added an LNA circuit on the basis of SA818, increasing sensitivity by 4dBm. <br/>4. Low power consumption, covering the entire frequency range of 400-470MHz, with power output fluctuations of less than 1dB. Low power can achieve an error of 27dBm+/-1dBm at 400-470MHz. <br/>5. High receiving sensitivity, with high receiving sensitivity, able to receive signals at long distances.</p><p>Product Description: <br/>SA818S is a cost-effective integrated professional walkie talkie module, equipped with a high-speed microcontroller, high-performance RF transceiver chip, and RF power amplifier. It also provides a standard serial port for communication with the module, allowing for easy and quick setting of module parameters and control of transceiver functions. Users only need to connect an external audio amplifier, microphone, and speaker to this module, and it can work as a small walkie talkie. The simplified interface and ultra small size enable this module to be widely used, and it can also be easily and quickly embedded into various handheld devices to improve the overall performance of terminal products. The SA818S walkie talkie module has added an LNA circuit on the basis of SA818, increasing sensitivity by 4dBm. The entire frequency range of 400-470MHz has a power output fluctuation of less than 1dB, and low power can achieve an error of 27dBm+/-1dBm at 400-470MHz. Note: The software and hardware interfaces are compatible with each other, just like before.</p><p>Parameter: <br/>UHF frequency band: 400~480 MHz <br/>VHF frequency band: 134-174 MHz <br/>Independent transmission and reception frequencies <br/>Bandwidth: 12.5KHz/25KHz <br/>RSSI signal strength indicator <br/>The transmission distance in open areas is 4-5 kilometers <br/>High receiving sensitivity: -124 dBm <br/>High integration and small size <br/>38 level CTCSS simulation sub audio code <br/>166 level positive and negative CDCSS digital sub audio <br/>Level 8 Quiet Noise <br/>8-level adjustable volume <br/>High power 1W (@ CE, 800mW), low power 500mW <br/>Wide range operating voltage 3.3-5.5 V <br/>Built in EEPROM, data saved in case of power failure <br/>Using 1ppm TCXO crystal oscillator, stable performance <br/>Application areas: <br/>Small walkie talkie <br/>Ignoring the intercom system <br/>Building and community security system <br/>Outdoor sports products <br/>Audio Monitoring System</p><p>Package include: <br/>1X module<br/><br/></p></div></div><p><br/></p>