GENERAL Frequency range ....................................... K,K3 : 450~520MHz K2,K4 : 400~470MHz Number of channels .................................. Zone : Max. 128 per radio Ch/GID : Max. 250 per zone (Max. 512 [Conv. Ch’s + GID’s] total per radio) Channel spacing ........................................ Wide : 25kHz Narrow : 12.5kHz Battery voltage .......................................... 7.5V DC ±20% Battery life (5-5-90 duty cycle, during hi-power) KNB-31A (1700mAh) ............................. Approx. 9 hours KNB-32N (2500mAh) ............................. Approx. 14 hours KNB-33L (1700mAh) .............................. Approx. 10 hours Operating temperature range.................... –22°F~+140°F (–30°C~+60°C) Frequency stability .................................... ±0.00025% (–22°F~+140°F) Antenna impedance .................................. 50Ω Channel frequency spread ........................ 70MHz Dimensions (W x H x D) ............................ 2-5/16 x 5-6/16 x 1-5/16 in. (58 x 136 x 33 mm) with KNB-33L battery (Projections not included) 2-5/16 x 5-6/16 x 1-9/16 in. (58 x 136 x 39.5 mm) with KNB-31A or 32N battery Weight (net) .............................................. 14.1 oz. (400 g) with battery (KNB-33L), antenna (KRA-23) and beltclip (KBH-11) RECEIVER (Measurements made per EIA/TIA-603) Sensitivity (12dB SINAD) ........................... Wide : 0.25μV Narrow : 0.28μV Selectivity .................................................. Wide : 70dB Narrow : 63dB Intermodulation distortion ......................... W/N : 70dB (±50, 100kHz) Spurious response .................................... 70dB Audio output (8Ω impedance) ................... 500mW with less than 3% distortion TRANSMITTER (Measurements made per EIA/TIA-603) RF output power ....................................... HI : 5W LO : 1W Spurious response .................................... 70dB Type of emission ....................................... Wide : 16K0F3E Narrow : 11K0F3E FM hum & noise ....................................... Wide : 45dB Narrow : 40dB Audio distortion ......................................... W/N : 3%