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Descriptions: - 2.2 " precision LCD screen,High-lumen LCD brightness, easy to read in direct sunlight - Heavy duty Aluminum enclosure,strong anti-interference ability. - Very compact and convenient for field use - Built-in rechargertable battery - Full Band control by knob ( 132-173Mhz / 200-260Mhz / 400-519MHz) - Easy setup, only four control buttons with convenient on-screen soft menus - Constant Battery Status Indicator and Auto Shut-off - Built-in timer shows elapsed time when unit is turned on - High efficiency IC, low power consumption, the longest working hours - More choice measurement frequency Span . - One botton quick scan mode (V1,V2,U) or 3 band by full screen. - Auto marker the low s.w.r. level reference Specifications: Frequency Range: 132-173Mhz / 200-260Mhz / 400-519MHz Connector: SMA-Female (50 OHM) RF Output Power: 1-1.5V(5 - 10dB) Frequency Step: 0.1/1/10/100/1000KHz V.S.W.R. Range: 1.00-19.99 ZRX Range: 0-99.9 Build-in Battery : 3.7V 900mah ,Li-ion 14500 Voltage input : DC5V> 500mA Frequency stability: