Embedded Walkie Talkie Module LS-818 RDA1846S Chip UHF 400 - 480 MHz RDA1846S Chip 5km

LS-818 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 LS-808.LS-818 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 LS-818: LS-818-U and LS-818-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:
LS-818-U: U band, 400 --480MHz LS-818-V: V band, 134 -174MHz

Features:

• Frequency: 400 ~ 480 MHz (UHF)
• Tx and Rx frequency, Tx and Rx CTCSS can be set alone.
• Band width 12.5/25KHz
• Output power up to 1 w
• Transmission distance up to 3.5 to 5 km in Open area
• Sensitivity: - 124 DBM
• High integration,small size
• Built-in EEPROM, data kept even power off off
• 38 level CTCSS code / decode
• 166 level positive, reverse phase CDCSS digital audio
• 8 level squelch
• 8 adjustable volume
• High/ low power is optional (500 mw) - 1 w
• Wide range of working voltage 3.3 to 5.5 V with 1 ppm TCXO crystal, stable performance

Applications:

• Small walkie talkie
• Invisible intercom system
• Sport products
• Building community security system
• Audio surveillance system

Shenzhen Qianhai Lensen Technology Co., Ltd mainly designs and produces industrial wireless data communication products including RF module, radio modem, DI, DO, AI, AO module and kinds of RF based remote control, telemetry systems and IOT products.

Our products are widely used in oil, gas, water, power industry, wireless alarm and security systems, intelligent traffics and irrigation, industry automation and many other M2M applications. RF data modules just instead the RS232, RS485 cable between different equipments to transmit serial data. RDIO series are designed for industry ON-OFF control. They are widely used for pump, valve, tank, motor, light, alarm control. RAIO series are used to collect voltage (0-5V) or current (4-20mA) signal. They are widely used to collect kinds of sensors data and signal. The GPRS RTU is suitable for transferring data from device to internet, and transferring data from internet (Monitoring center or server) to device.

Lensen commits to provide our customers better products and service. Our engineers are experts with more than 10 years experience in this field, rising to the challenge of developing high tech and competitive products. Apart from providing a series of off-to-shelf products, Lensen has the capability to cooperate with companies and individuals that need customized products and ODM wireless solution. Choose Lensen, your wireless systems will link faster.

To meet different customer's requirements, we open a new product lind---Wireless irrigation.

we can provide one-stop intelligent wireless irrigation control solution, including DC type valve decoder, AC type valve decoder, wireless irrigation controller, soil moisture sensor, mobile irrigation APP, etc. Our products, software and services help customers manage and optimize project operations, improve interoperability, improve green ecology and enrich people's life.