Frequency Range 450 – 500 (TX), 520 (RX) MHz*1 Number of Channels 128*2 Channel Spacing 12.5 kHz / 25 kHz Operating Voltage 7.5V DC ±20% Battery Life (5-5-90, Saver OFF) with KNB-45L Approx. 12 hours Operating Temperature Range -30°C to +60°C Frequency Stability ± 2.5 ppm (-30°C to +60°C ) Antenna Impedance 50 Ω Dimensions (W x H x D),Projections Not Included with KNB-45L 54 x 122 x 33.7 mm Weight (net) Radio only 180 g with KNB-45L 300 g Applicable Environment Standards IP54/55, MIL-810 C/D/E/F/G Australia / New Zealand Commercial AS/NZS 4295:2004 80-channel CB AS/NZS 4365:2011 RECEIVER Sensitivity (EIA 12dB SINAD) 12.5 kHz / 25 kHz 0.28 μV / 0.25 μV Selectivity 12.5 kHz / 25 kHz 60 dB / 70 dB Intermodulation Distortion 12.5 kHz / 25 kHz 60 dB / 70 dB Spurious Response 70 dB Audio Distortion Less than 5 % Audio Output 500 mW / 8 Ω TRANSMITTER RF Power Output(High / Low) 5 W / 1 W Spurious Response 70 dB FM Hum & Noise 12.5 kHz / 25 kHz 40 dB / 45 dB Audio Distortion Less Than 5 %