SF103 Support test frequency from 2MHz-200MHz / 27MHz -2800MHz ,capable of measuring the parameters of the frequency of the continuous carrier signal walkie-talkies , with signal strength indicator.CTCSS/DCS testable for 144/430MHz,DMR Digital Signal Testable. TFT LCD320 x 240 pixels Color Display 144/430MHz CTCSS/DCS Decoder LCD Dim level set Frequency Response time:0.2-0.5sec CTCSS/CDCSS Response time: 0.5-1sec Work by TCXO 2~2.5ppm Response time: 0.2s Build-in Li-ion battery Micro-USB +5V Charge in 4 buttons control Auto power off 1-9minutes Charging indicator Impedance input: 50 Ohm (BNC) General Specification: Radio Signal: Digital/Analog Frequency Range: 2MHz-200MHz / 27MHz -2800MHz Li-ion Battery build-in: 3.7V 1500mah Plug Type: US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the , the Philippines and so on. Voltage: AC100-240V Colour:Gray Material:plastic+metal Package Contents: 1 x Frequency tester 1 x antenna 1 x charging cable 1 x charging 1 x belt clip Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.