Features: This device features low cost, small size, low power consumption, high and high stability, wide dynamic range. It has a frequency range from IF to UHF audio. Suitable for a variety of applications which need to reduce signal to decibel equivalent. Excellent power non-sensitivity and temperature stability. Widely used for converting signal level into dB form, transmitter antenna power measurement, received signal strength indicator(RSSI), low-cost radar and sonar signal processing, network and spectrum analyzer (reaching 120 dB), determining signal level is as low as 20 Hz, multimeter true dB communication mode. Specification: Model: AD8307 Input power default range: -75 ~ +15 dbm Power supply voltage: 6 ~ 12 V@ < 10mA Weight: 37 g / 1.3 oz(approx.) Package list:1 * Power Meter