Features: Integrating radio frequency technology to provide long-distance and low-power wireless communication solution. Ra-01SC module have the characteristics of strong stability and strong ability, and is suitable for communication requirements in various complex environment. It have data transmission function, supports wide area Networking communication and is convenient for remote monitoring and control. Easy to be in various devices and systems, and realize wireless communication function. Support a variety of Interfaces protocols, such as SPI, UART, etc., which is convenient to connect with different types of main control boards or sensors. High flexibility, different working and setting can be realized through software configuration. Specifications: Module model: Ra-01SC Size: Approx.2.6x2.6cm/1.02x1.02inch Communication Interfaces: SPI Programmable bit rate: up to 300kbps Spectrum ranges: 410-525MHz Antennas form: compatible half-hole/through-hole pad (antennas needs to be soldered) Transmit power: +22dBm Power supply ranges: 2.7V-3.6V, with typical value of 3.30V and current greater than 200mA. Working temperature: -40℃-85℃ Storage environment: 40℃-125℃, < 90%RH. Transmission distance: the open field is equipped with a spring antennas, and the measured distance 2.8km. Crystal frequency: 32MHz Package Includes: 1 Set Wireless Module note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.