Support PC connection, support -APP connection, transfer data to computer, synchronize display screen to computer. 200Hz-850kHz : as low as 200Hz effectively distinguishes adjacent signals, meets the requirements of SSB two-tone intermodulation test, and the widest 850kHz achieves fast scanning. 4-inch IPS touch screen for clearer display and more convenient operation. 5000mAh battery for 12 hours of battery life, long-term measurement. Support Micro-SD card to save measurement data and screenshots at any time. Color: As shown Material: Metal Package Contents: 1 x Attenuator 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.