... color display3.300meters barrier free remote control distanceProduct Name: Wireless video Doorbell(1v2) 1,2.4GHz launch frequency, Approx 300meters barrier ... angle, clear long-range images, Approx 280M barrier free.4,Infrared night vision function, with a good safety monitoring in low ... for more than 2 months.11,One monitor for one cameras or up to three12,World Public Frequency 2.4G digital ...