... Waterproof,outdoor use 3) 1 year waranty CATV wireless transmitter with receiver: 28 Channel Digital Display ReceiverVolume115*80*21mmOperation Temperature-20-- ... 160*75mmBarrier-free transmission distance1-3KM (with 24DB Antenna) Users can self-matching transmitter and receiver gain 13DB, 15DB, 24DB outdoor high ... , grassland cattle and sheep shed monitoring. CATV wireless transmitter with receiver