Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si SA618F30 is a cost-effective and highly integrated high-power full-duplex intercom module. This module has built-in high-speed microcontroller, high-performance RF transceiver chip and RF power amplifier. It also provides a standard serial port to communicate with the module, making it easy and quick to set up. Relevant parameters of the module and control the sending and receiving 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 can be easily and quickly embedded into various handheld devices to improve the overall performance of the terminal product 1W 8-channel full-duplex data and voice transmission, multi-level relay, supports concurrent concurrent reception of multiple devices, I2S digital audio + analog audio Supports OTA and serial port online upgrades, PC software configuration simplifies the operation process, long-distance transmission (transmission distance up to 3-4 kilometers, ensuring barrier-free communication over long distances) Various application fields, such as high-end full-duplex intercoms, conference phone systems, headset intercoms, building community security systems, security in special scenes, and intercoms for special types of work Frequency range:410-490MHz Up to 8 devices can transmit at the same time ( on reception) Supports cancellation function Button intercom and intercom dual modes Multi-level wireless relay I2S digital audio + analog audio Line In+Mic input Support data transmission & USB serial communication interface Support OTA and serial port upgrade Long-distance transmission:The transmission distance in open areas is 3-4 kilometers High receivingsensitivity:-117 dBm Ultra-low power sleep mode Transmission distance in open areas is about 3-4 kilometers Colour:As Shown Material:PCB Package Contents: 1 * Wireless Audio Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.