Working Current8mAFrequency433MHBatteryCR2032(3V)Coding
Type1527/HCS300Distance45mAntennaInsideDimensions67*31*16mmButtons4
1.How long distance of your remote controls? R: The distance
has been marked on the product page. According to our testing
standards, the distance of KRG series is among 30m-300m and KLR
series is among 1,000m-31,000m. 2.Is the distance real? Why
is it different from my using? R: All our distances are real
by test under our standards. The distance depends on three factors
which are transmission power, receiving sensitivity and using
environment (including installation location, obstacles,
electromagnetic noise, weather, etc.). The distance may vary as
long as any of these factors changes.3.What is your test standard
of distance? R: The test standards of distance
are different between our KRG and KLR series.
Please refer to the product page for details. 4.Is the antenna
important? Can I remove the antenna? R: Antenna is used to
transmit/receive radio signal. It is very important for every RF
product. There are external (eg. Spring antenna) and internal (eg.
PCB antenna) antennas. The distance will be much shorter if the
external antenna is removed, coz the power of radio can't be
sent out. The circuit even may burn out especially for high power
transmitters. 5.Is the antenna the longer the better?R: Of course
not. The performance of antenna depends on length and resistance.
The signal will be the best when antenna is 1/4 long of the
wavelength(λ). For 433.92MHz, 1/4 of λ is about 17cm. Other
length may shorten the distance. 1/2 or 1 λ are also possible,
but the resistance must be adjusted as well. Pls contact us if you
want to change the antenna. 6.Why all your products work at
433.92MHz/315MHz/868MHz? Can I have different frequency? R:
The frequency band is controlled by the governments. But the
governments open some frequency bands for ISM(Industrial Scientific
Medical) using which are license-free. For example, 433.92MHz in
Western Europe, 868MHz in Northern Europe and 315MHz in China &
Japan. We can make the product with special frequency for you if
the frequency is license-free or you've got the license
already. 7.How long is the battery life? R: Battery life
depends on 3 factors which are power consumption, battery capacity,
and pressing times. Normally, the battery of KRG series can last
over 1 year if short pressing 5 times every day.8.Does
your price cover tariff? How much should I pay for customs
clearance? R: Our price doesn't cover tariff and shipping
cost. Paying tax is the duty of every importer. However, there are
shipping lines for some countries/regions that including customs
tax. Pls contact our sales for details. The tariff policy is
different in countries. You can ask your customs for details.9.What
is coding type? What coding type do you have? R: The code is
the information included in the signal. We mainly have 2 coding
types for ASK/OOK products which are Learning code(1527) and
Rolling code(HCS301/300). We use our private coding type for FSK,
LoRa and paging system.10.What is co-frequency interference? How to
avoid? R: Co-frequency interference means interference caused
by a useless signal which has same frequency as useful signal. The
co-frequency interference can only be weakened. We used to adopt
frequency-hopping technology to avoid it./* March 10, 2023 17:59:20
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