Long range wireless audio intercom/wireless door phone up to 1000 meters communication distance and 100 handset extendable/built in lithium battery.
high fidelity audio technology.
zero block sound transmission.
100 handsets extendable.
built-in battery: lithium battery 1500mah.
input voltage: dc 5v.
hand on wall or put on table.
more than 1000 meters in open file.
wireless audio intercom system can support 100 persons intercommunicating at most.
using 433mhz public frequency.
air transfer rate : 256k.
transmitting power : <18dbm, receive sensitivity : <-100.
strong anti-jamming capability.
panel with 10 number buttons, a call button and two indicator lights : power indicator light (red), operating indicator light (green)
with coding, giving code, id setting functions.
dc5v, or li-lion battery power supply, standby current : 3.5ma, work current : 400ma.
Communicate distance: more than 1000 meters in open land