The TX4G-PCB-6613 is a wireless module manufactured by ZIISOR for size compatibility with small circuits. This module is 66 mm by 13 mm for space-saving installations and is RoHS compliant for environmental protection. This module is designed for high-quality applications and features a frequency range up to 4 GHz and a maximum output power of 20 dBm. The TX4G-PCB-6613 has a standard 2.4 GHz radio communication protocol and supports I2C, UART, SPI and PWM signals. Additionally, this device is compatible with 3.3V supply power, has a working temperature range from -20°C to 70°C and has a low-power standby mode to conserve energy.