Feature:1. Harmonic Suppression: With harmonic suppression function, even harmonic is better than 50dB, and the odd harmonic is better than 10dB.2. Adjustment Range: The adjustment range of frequency is 10KHz to 220MHz, the generator is easy to operate with knob and display screen.3. Precise Generation: The frequency generation is highly precise which the accuracy is up to 0.1Hz, with high stability.4. High Stability: The variable frequency oscillator adopts premium housing and excellent electronic parts, the performance is stable and reliable.5. Compact and Portable: The generator is built in large capacity battery, compact in size and light in weight, very easy to carry.Specification:Item Type: Frequency GeneratorMaterial: Aluminum alloyPower Supply: Lithium battery 3.7V 1000mAh (built in)Power Consumption: <150mAFrequency Adjustment Range: 10KHz-220MHzFrequency Accuracy: 0.1HzOutput Level: About 10dBmCrystal Type: Temperature compensated crystal oscillator (tcxo)Output Type: Default squarewaveHarmonic Suppression: Even harmonic is better than -50dB, odd harmonic is better than -10dB.Package List:1 xFrequency Generator1 x USB Cable1 x GPS Antenna