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 applications 5. Built-in MCU, communicate through serial port and external device 6. 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-38 Chip: SI4438 Communication interface: UART 3.3V to 5V TTL level Operating voltage: 3.2V to 5.5V Maximum transmission power: 20dBm Reference distance: 1200 meters Working frequency band: 433-458.5MHz Antenna interface: spring antenna / antenna socket Sleep current: no sleep mode Module size: 26.7x12.9x6mm Package Included: 3 x Wireless MCU Serial Module