... ,Realtime data transmit 4,3 kilometers walktalk Real time Wireless transmission Intercom patrol system HUA-101 G is a ... consumption36mAOperating temperature-30°C~+60°CStorage temperature-40~70°CDimension120mmX76mmX21mmRFID Reader1.Guard tour system combines interphone, two in one.2. Wireless& auto ... forestry, field, property management and storage, etc. Real time wireless transmission intercom system