FM AM Receiver 150K to 108MHz High Accuracy Portable Shortwave Receiver with Battery Item Type: FM AM Receiver Material: PCB, Stainless Steel, Aluminum Shell Operating Range: AM: 150kHz to 30MHz, FM: 64 to 108MHz Power Supply Mode: 3.7V 1000mAh polymer li battery (built in) FM Mode: 1. Rotate Encoder Knob: Adjust the volume or frequency. When the encoder is rotated at the beginning, the knob can adjust the volume, press the encoder once, the knob can adjust the frequency. 2. FM: When the page is in AM mode, press the FM button once, the page becomes FM mode. 3. BWF: Bandwidth, press the button to change the size of the bandwidth, there are five options: AUTO, 40 K, 60K, 84K, 110K. 4. AM: When the page is in FM mode, press the AM button once, the page changes to AM mode. When the page is in AM mode, short press the AM button to increase the frequency, long press the AM button to decrease the frequency. 5. SAV: Short press to change the size of TS (step frequency), there are five gears: 0.1MHz, 1MHz, 2MHz, 5MHz, 10MHz. Long press to save the changed TS (step frequency). AM Mode: 1. Rotate Encoder Knob: Adjust the volume or frequency. When the encoder is rotated at the beginning, the knob can adjust the volume, press the encoder once, the knob can adjust the frequency. 2. FM: When the page is in AM mode, press the FM button once, the page becomes FM mode. 3. BWF: Bandwidth, press the button to change the size of the bandwidth, there are five options: 0.1K, 1K, 2K, 5K, 10K. 4. AM: When the page is in FM mode, press the AM button once, the page changes to AM mode. When the page is in AM mode, short press the AM button to increase the frequency, long press the AM button to decrease the frequency. 5. SAV: Short press to change the size of TS (step frequency), there are four gears: 1KMHz, 5KMHz, 10KMHz, 100KMHz. Long press to save the changed TS (step frequency).