Bluetooth LW AM SW FM Radio Signal Generator Medium short wave transmitter LED display frequency+Antenna FOR Repair Calibration

4-Band Radio Signal Generator (LW/AM/SW/FM) | Portable 18650 Battery Powered TYPE-C USB 5V rechargeable battery| Bluetooth & External Input Support WITH Circular Antenna Product Description:Refer to advertising videos before purchasingProfessional four-band radio signal generator covering LW (100-525KHz), AM (400-1700KHz), SW (1.7-30MHz), and FM (76-108MHz) frequencies. Generates standard IF signals (455KHz, 465KHz, 10.7MHz) for radio repair and alignment. Features digital PLL technology for high frequency accuracy and stability. Powered by single 18650 battery with built-in charging circuit and Type-C port.Key Features:Four-Band Coverage: LW/AM/SW/FM full spectrum supportStandard IF Outputs: 455KHz, 465KHz, 10.7MHzDigital PLL Technology: High precision and stabilityDual Input Modes: Bluetooth connectivity (XWF-M18-M28-M38) + external signal inputPortable Design: 18650 battery powered with Type-C chargingProtection Circuit: Built-in over-discharge protectionDistance: Medium wave 2-3 meters, FM about 5 metersFrequency Ranges:Long Wave (LW): 100KHz - 525KHzAM Band: 400KHz - 1700KHzShort Wave (SW): 1.7MHz - 30MHzFM Band: 76MHz - 108MHzPower Specifications:Battery: 1× flat-top 18650 (not included)Charging: Type-C port (5V standard)Critical Warning: Use only 5V chargers - DO NOT use fast chargers (12V output will damage device)Operation Guide:Basic Controls:Power Button (far left): Press to wake/short press to cycle settings/long press 3-4s to power off+/- Buttons: Adjust frequency valuesFrequency Setting Examples:FM 107.5MHz: Set to 107500FM 87.5MHz: Set to 087500AM 900KHz: Set to 000900IF 455KHz: Set to 000455Setup Procedure:Install battery (observe correct polarity - device powers on automatically)Short press power button until first digit blinksSet value 5: Disable internal signal sourceSet value 6: Enable internal signal sourcePress again until first two digits blinkAdjust highest two frequency digits (00-19)Continue pressing to select each digit positionUse +/- buttons to adjust blinking digit valuesBluetooth Connection:Device Name: XWF-M18-M28-M38Package Includes:Signal generator main unitImportant Notes:Requires flat-top 18650 battery (not included)Use only 5V USB chargers - fast chargers will destroy the deviceDisplay units in KHz (divide by 1000 for MHz values)Applications:Radio repair and alignmentEducational demonstrationsSignal testing and troubleshootinghobbyist projects