3Pcs GT-38 Wireless MCU Serial Module SI4438/4463 1200 Meters Receive UART Interface Wireless Communication Module

Features 1 Long distance wireless transmission 1200 bps in 1200 m FU4 mode 2 Operating frequency range 433 458MHz up to 255 communication channels 3 Maximum 100mW 20dBm transmit power and can set 8 power 4 Four working modes to adapt to different applications5 Built in MCU communicate through serial port and external device6 The number of bytes sent at one time is up to 256 bytes 7 The mode supports one to one one to many many to many connections Characteristic Parameters Model GT 38Chip SI4438Communication interface UART 3 3V to 5V TTL levelOperating voltage 3 2V to 5 5VMaximum transmission power 20dBmReference distance 1200 metersWorking frequency band 433 458 5MHzAntenna interface spring antenna antenna socketSleep current no sleep modeModule size 26 7x12 9x6mm Package Included 3 x Wireless MCU Serial Module