Check the listing for details. LEIXEN N8 Handheld Frequency Meter Counter LCD Display CTCSS/DCS For 2-Way Radio. Condition: New. Listed at 26.46 USD. LEIXEN N8 Handheld Frequency Meter Counter LCD Display CTCSS/DCS For 2-Way Radio Main Feature: N8 handheld frequency counter using dot-matrix LCD, it mainly used to measure the frequency, CTCSS and DCS of radio transmission. The counter has antenna to make measurement quick and convenient. Specification: Operating current: 46mA Battery: 3-1.5V AAA Batteries (Batteries not included) Measure range: Frequency 1MHz-1000MHz, all CTCSS, all DCS Measure Method: 1. Press the power button to turn on the counter, put the signal source nearby the counter, the measured frequency will be displayed within 1 second. (Sometimes there is a frequency value on the screen already when the counter power on, that is an interference frequency. You should press the power button once after put the signal source nearby the counter, and then the value is measured.) 2. If the signal source has a CTCSS tone, the tone will be showed directly below the transmitted frequency display. 3. If the signal source has a DCS code, the normal code and the invert code of DCS are simultaneously showed directly below the transmitted frequency display. (The DCS measurement would take one second more time.) 4. To measure again, press the power button Operation: Power On/OFF: Press the power button and release to power on. Press the power button and hold 2 seconds to power off. Test measurement results: To test the results, press the right M button, the counter will transmit a low level signal with a tone. Your receiver will hear this so you know that the tested frequency and tone is correct. Automatic power off: In the absence of any operating system would power off automatically after 60 seconds. Package includes: 1 x Yellow N8 Mini Portable Frequency Counter (Batteries not included) 1 x Antenna 1 x User's Manual