Features: Brand new and high quality Built in standing Waves meter and power meter function, high cost performances Imported magnetic rings, imported 1N5711 detector diode Instead of directly applying open-source files, it has been completely designed to solve the problems of screen, random code and standing Waves Support 10 tuning results storage Support firmware upgraded, and the function will be updated continuously in future. Specifications: Product model: AT-100m Supporting stations: Jianwu Bazhou, USDX, QRP and other arbitrary stations Frequency range: 1.8mhz-30mhz Size: Approx.139x74x29mm/5.47x2.91x1.14inch Product weight: 370g Charging current: 5v1a supporting over discharge Battery capacity: 3300mah Shutdown current: about 15ua Standby: about 13mA, about 150-200 hours standby Charging time: about 4 hours. The LED indicator is red during charging and green when fully charged. Package Includes: 1x AT100M Tuners 1x Type C Data Cable note: 1.Before using its own tuning, be sure to switches on the minimum power of the power control rooms to prevent damage to the radio station. 2. When the radio is used or replaced for the first time, the standing Waves power value of the equipment needs to be recalibrated. When the radio is inconsistent with the standing Waves power value displayed by the equipment 3 Please use the USB Type C charging cable attached to this product to charge. If you use other brands of USB Type C fast charging cable, you may not be able to charge.