Higher reliability and durable quality 0802 LCD display with low power consumption Standard interface for easy connections with other devices or antennas Input via SMA jack (female) Color: Dark Green Material: PCB + FR4 Power supply: 9V battery (not included) Display: 38 x 16mm LCD Item size: 60 x 33 x 26.5mm / 2.36 x 1.30 x 1.04in Item weight: 45g / 1.54oz Package size: 11 x 6 x 3cm / 4.33 x 2.36 x 1.18in Display type: Digital 0802 LCD Operating temperature: 0 to 40°C, storage temperature: -30 to 60°C Working elevation: 0 to 2000 meters Relative humidity: non-condensing <10°C Battery type: 6F22 9V Operating voltage: DC 9V Operating current: typical 30mA Test frequency range: 1 to 500 MHz (extendable up to 640 MHz with reduced accuracy) Resolution: 100 Hz Note: Accuracy adjustable to two decimal places; precision below one-tenth may vary Instructions: Connect a 6F22 9V battery, toggle the switch, and connect to the signal source after powering on Frequency meter interface: SMA Package includes: 1 x High Accuracy RF Frequency Counter Meter 1-500 MHz Tester Module for Ham Radio