Beware of poor quality clones: https://tinysa.org/wiki/pmwiki.php?n=Main.Buying

 Shell size: 58.7mm x 91.3mm x 17.1mm (excluding protrusion)
Frequency accuracy: 2ppm
Frequency stability: 1ppm
Display: 2.8 "TFT (320 x240) resistance touch screen
USB interface: USB type-C communication mode: CDC (serial)
Power supply: USB 5V 150mA, built-in 650mah battery, maximum charging current 300mA, charging time 1 hour 2 hours
Gross weight per unit: 0.25 kg
Package size: 19.5 * 12.5 * 2.5cm
Built in battery: 650mah (with test report)
Low input mode specification:
Input frequency range: 100kHz 350MHz
Front attenuator: 0db-31db, step 1dB, manual and automatic input attenuation
Absolute maximum input level: + 10dBm without attenuation
Damage level + 20dbm
Third order modulation (IIP3) input cut-off point: + 15dBm at 0dB attenuation
1dB compression point: + 2dbm at 0dB attenuation
Power detector resolution: 0.5dB + / - 1dB.
Minimum identifiable signal: -102dBm@30kHz RBW
The phase noise is - 90dB / Hz at 100kHz and - 115dB / Hz at 1MHz.
When using 30kHz resolution bandwidth of 70dB, there is no branch line dynamic range.
The resolution filters of 3, 10, 30, 100, 300 and 600 kHz can be selected manually. Automatically select one of 57 resolution filters.
The resolution on the screen is 51, 101, 145 or 290 measurement points.
Using the filter with the maximum resolution, the scanning speed exceeds 1000 points / second.
Automatically optimize the actual scan points to ensure coverage of the entire scanning range, regardless of the resolution bandwidth selected.
Branch suppression option, used to evaluate whether some signals are generated internally or actually exist in the input signal.
High input mode specification: (high input mode is a low if reception using a second receiver, without front mirror image and spurious filter)
Input frequency range: 240mhz to 960MHz
The input impedance is frequency dependent and deviates from 50 ohm.
Since there is no input band filter, strong input signals beyond 240mhz to 960MHz will cause in band signal distortion.
Absolute maximum input level without attenuation + 10dBm.
The third-order modulation product (IIP3) with a cut-off point of - 5dBm is input.
The 1dB compression point is - 6dbm without attenuation.
The power detector has a resolution of 0.5dB and a frequency linearity of + / - 1dB.
The absolute power level accuracy after power level calibration is + / - 1dB.
Use resolution bandwidth of 30kHz - 115dbm minimum identifiable signal.
The frequency accuracy is equal to the selected resolution bandwidth
When 30kHz resolution bandwidth is 50dB, there is no branch line dynamic range.
The resolution filters of 3, 10, 30, 100, 300 and 600 kHz can be selected manually. Automatically selects