I find the number of channels/zones (160/50) a bit disappointing, but the price is right.

General Specifications
Frequency range	VHF: 136-174MHz, or UHF: 350-390 MHz, or UHF: 400-470 MHz, or UHF: 450-520 MHz
Channel Capacity	160
Zones	50
Channel Spacing	12.5KHz
Voltage	DC 13.8V (±15%)
Frequency stability	±1.5ppm
Antenna impedance	50Ω
Dimensions	150(L)*160(W)*40(H)mm
Weight	1.29Kg
Transmitter
RF power output	VHF/UHF high power:30W VHF/UHF low power:15W
4FSK Modulation	12.5kHz (only data):7K60FXD 12.5kHz (data and voice):7K60FXE
FM Modulation	12.5 kHz:8K50F3E
Modulation Limiting	+/- 2.5kHz @ 12.5kHz
FM Noise	-40dB
Conducted  Emission	-36 dBm≤1GHz/-30 dBm≥1GHz
Adjacent Channel Power	≤-60dB
Audio Response	+1/-3 dB
Audio Distortion	3%
Digital Voice coder Type	AMBE+2
Receiver
Digital sensitivity	5% BER:0.25 uV
Analog sensitivity	0.25 uV (12 dB SINAD)
Inter-modulation	60dB
Adjacent Channel Selectivity	60 dB
Spurious Response Rejection	70 dB
FM Noise	-40dB
Audio Response	+1/-3 dB
Audio output	3W
Audio Distortion	3% (typical)
Conducted Spurious Emission	-57dBm
GPS Accuracy	Horizontal Accuracy≤-10m (with well signal)
TTFF (Time To First Fix) Cold Start	< 1 minute(with well signal)
TTFF (Time To First Fix) Hot Start	< 10second(with well signal)
Environmental Specifications
Working Temperature	-20℃—+70℃
Storage Temperature	-40℃—+80℃
Humidity	MIL-STD-810C/D/E/F
Vibration & Shock	MIL-STD-810C/D/E/F