Power supply interface: Type-C Power supply voltage: DC 4.5V-5.5V Standby current: Less than 25mA. Emission current: Less than 150mA. Output impedance: 50 ohms Output frequency range: 35MHz-4400MHz. Output step: 1KHz-8KHz. Output: SMA standard interface inner hole. Output power:- 1dBm (W) @ 150MHz (absolute value of test power) approximately 1 mW Size: 80mm x 75mm x 30mm (excluding interface) The operating keyboard of this product has 15 ppt keys, 0-9 numeric keys, 10 "++" and "-" keys to adjust the frequency of use, and also generates emission output behavior. Short pressing the "++" or "-" keys add 1kHz or negative 1kHz to the original frequency output. Pressing the "++" or "-" keys for more than 1 second result in continuous or continuous subtraction scanning mode. 1kHz when stepping from 35kHz to 138MHz; 138MHz is 138kHz. The steps are 10kHz at~550MHz and 100kHz at 550MHz~4000MHz. To end the scan, simply the "++", "-", or "OK" buttons. The 'OK' button is the output control button. again to stop the transmission. The emission behavior caused by "++" or "-" requires pressing "OK" twice to end the transmission, and the product display "" in the upper right corner. When the output emission behavior occurs, the "C" key terminate the transmission with a frequency of zero. Step "()" key, used for continuous addition and subtraction scanning mode for easy adjustment, cyclically selecting steps "1K", "10K", "100K", "1M". By pressing the "()" button, the new underlying LCD1602 defaults to the "(1k)" step indication when powered on. Four types of step states can be executed in a loop. Color: Green Material: ABS Package Contents: 1 * signal generator 1 * charging cable 1 * antenna Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.