interphones T-369 New Product Main Features: Emergency alert Vox function CTCSS/DCS Voice annunciation(Chinese/English) Lock missing or low voltage alarm Appearance more beautiful, more bright timbre and more pure. Accord to America army standard that testing support by MIL-810C, D, E rainwater humidity, dust and vibration impact. Frequency range：400-470 MHz Radio-frequency output power: 7W Large capacity battery （1500mAh）can give call for 15 hours Channel number: 16 Rated voltage: 7.5V DC Volume:100mm*57mm*30mm Weight:199g Receive part Sensitivity（12dB SINAD） ≤0.2 uV incept bandwidth ?7 kHz Border upon channel selection >65 dB （?25 kHz ；EIA） Intermediation distortion >60 dB （?25k / ?50k / ?1M / ?2M） Noise response > 60 dB Audio frequency output power 500mW <10% Frequency stability ?2.5ppm Channel extension scope 20 MHz Transmit part radio-frequency output power (high/low) ≤7/5W modulate mode 16kфF3E noise and harmonic radiation < 70 dB modulation noise（300-3000 Hz） <45 dB modulation distortion（300-3000 Hz） <5% frequency stability ?2.5ppm channel spread spectrum scope 20 MHz maximum frequency deviation ?5 kHz（1000 kHz100%）