Channel Dual channel Chassis EIA Standard 19” 1/2U (212 x 180 x 44 mm) Frequency range UHF470-786MHz (CE standard) Frequency response 40Hz-15 kHz ± 3dB Antenna Real panel (Detachable) Stability ±0.005% (-10~60°C) Sensitivity 22dBuV S/N ratio>106dB(A) T.H.D. <1.0% RF power 9 mW Power supply DC 12V/ 800mA Operation range 80M (265 ft.) Audio output Balanced & unbalanced Battery 3V (1.5V AA x2) Battery working time Up to 8 hours