Features: Adopts premium housing and quality electronic parts, with accuracy process, which ensures fine durability and long service time. Digital display design, you can see the operation mode, current frequency, volumes, bandwidth clearly. Rotary encoder knob design, adjust the size of the volumes or frequency; at the beginning rotate the knob to adjust the size of the volumes, then press the coder once and rotate the knob to adjust the size of the frequency. Frequency modulation mode and amplitude modulation mode adjustable, you can adjust according to your demands. Press the BWF button to change the size of the bandwidth, under frequency modulation mode there are AUTO, 60K, 84K, 110K five gears adjustable, and there are 0.1K, 1K, 2K, 5K, 10K five gears under amplitude modulation mode. Frequency adjustable design, short press AM button to increase the frequency, long press AM button to reduce the frequency. Short press SAV button to change the size of the step frequency, 0.1MHz, 1MHz, 2MHz, 5MHz, 10MHz five gears under frequency modulation mode; 1KMHz, 5KMHz, 10KMHz and 100KMHz four gears under amplitude modulation model; long press to save the changed step frequency. Specifications: Name: DSP Receiver Material: metal Color: black Battery: 1 * 3.7V, 1000mAH battery (included) Item size: 89 * 80 * 40mm / 3.50 * 3.15 * 1.57in Item weight: 198g / 6.98ounce Package size: 135 * 132 * 50mm / 5.31 * 5.20 * 1.97in Package weight: 251g / 8.85ounce Packing List: 1 * DSP Receiver 1 * Type-C Cable 1 * Antenna