Features 1、It has 10kHz to 220MHz working ranges. 2、0.5PPM high precise Tcxo clock, the frequency is more accurate. 3、Tuning step of 1Hz, 10Hz, 1kHz, 5kHz, 10kHz and 1MHz. 4、Intermediate frequency (IF) offset (+ or -) is adjustable. 5、20 band presets (shortcuts) for BCB and HAM frequencies. 6、Equipped with generator function mode. 7、RX/TX mode selector for Homebrew QRP transceivers. 8、The bar graph of the signal meter through the analogs input (ADC). 9、It can be used as a local oscillator on Homebrew radio receivers (such as superheterodyne, software defined radio, direct conversion and Homebrew QRP transceivers). 10、Can be used as a simple RF/clock generator for calibration reference or clock generation. 11、And also can be used as a common 128x64 I2C OLED display and Si5351 module. 1 2、I2C data transmission, only need 2 lines it can be connected to the display, with high stability and accuracy of frequency generation. Specification Specifications: Name: Transceivers Battery: 1 * 3.7V, 600mAh battery (included) Item size: 90 * 100 * 40mm / 3.54 * 3.94 * 1.57in Item weight: 200g / 7.05ounce Package size: 175 * 126 * 55mm / 6.89 * 4.96 * 2.17in Package weight: 256g / 9.03ounce Package List 1 * Transceivers 1 * Type-C Cable