Description de l'article par le vendeur
Product parameters:
Small size:14mmx7mm
Operating Frequency: uhf (400-470MHZ Fixed frequency,random shipment)
Use the Analog signal intercom or special receiving equipment for the receiver
Work: NFM
Operating voltage: RED wire:DC 3 ~ 4.2V BLACK:GND
Current: about 20mA
Working distance: 500-800 meters in open place (voltage at different distances vary)
Application: Sound monitoring, security.