General Frequency Range ............................................................. 450~490MHz (K, M), 470~512MHz (K2, M2), 400~430MHz (K3, M3) Number of channels ......................................................... Max. 16 Number of groups ............................................................ Max. 16 Channel Spacing............................................................... 25kHz (Wide) 12.5kHz (Narrow) PLL Channel Stepping ...................................................... 5kHz, 6.25kHz Operating Voltage ............................................................ 7.5 VDC ±20% Battery Life ....................................................................... More than 9 hours at 4 watts (5-5-90 duty cycle with KNB-24L battery) Operating Temperature range .......................................... –30°C to +60°C (–22 °F to +140 °F) Dimensions and Weight With KNB-24L (1400mAh battery).................................. 56 (2-3/16) W x 109.3 (4-5/16) H x 34.5 (1-3/8) D mm (in) 290g (0.64lbs) With KNB-25A (1200mAh battery) ................................. 56 (2-3/16) W x 109.3 (4-5/16) H x 40.7 (1-5/8) D mm (in) 355g (0.78lbs) With KNB-26N (2000mAh battery) ................................. 56 (2-3/16) W x 109.3 (4-5/16) H x 40.7 (1-5/8) D mm (in) 400g (0.88lbs) Receiver (Measurements made per EIA standard EIA-603) Sensitivity EIA 12dB SINAD ........................................................... 0.25μV (Wide)/0.28μV (Narrow) Selectivity ......................................................................... 70dB (Wide)/62dB (Narrow) Intermodulation ................................................................ 65dB (Wide)/62dB (Narrow) Spurious response ........................................................... 65dB Audio Power Output ........................................................ 500mW/8Ω Frequency Stability ........................................................... ±2.5ppm Channel Frequency Spread .............................................. 40MHz (K, M), 42MHz (K2, M2), 30MHz (K3, M3) Transmitter (Measurements made per EIA standard EIA-603) RF Power output .............................................................. 4W/1W Spurious and Harmonics .................................................. 70dB Modulation ....................................................................... 16KφF3E (Wide)/11KφF3E (Narrow) FM Noise.......................................................................... 45dB (Wide)/40dB (Narrow) Audio Distortion ............................................................... Less than 5% Frequency Stability ........................................................... ±2.5ppm Channel Frequency Spread .............................................. 40MHz (K, M), 42MHz (K2, M2), 30MHz (K3, M3)