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 Generator Material: Aluminum alloy Power Supply: Lithium battery 3.7V 1000mAh (built in) Power Consumption: <150mA Frequency Adjustment Range: 10KHz-220MHz Frequency Accuracy: ±0.1Hz Output Level: About 10dBm Crystal Type: Temperature compensated crystal oscillator (tcxo) Output Type: Default squarewave Harmonic Suppression: Even harmonic is better than -50dB, odd harmonic is better than -10dB. Package List: 1 x Frequency Generator1 x USB Cable1 x GPS Antenna