SA818 Wireless Walkie Talkie Module UHF 400-480 MHz VHF 134-174MHz Audio Module

$29.79
  Availability: In Stock
  Shipping: Free Airmail 
  Estimated Delivery: 
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  •   Shipping Methods

    Handling Time

    Before we can ship your order, we prepare your products, do strict quality-control tests and carefully package the items. The time it takes to prepare your items for shipping is separate from the delivery time. It usually takes 1-3 business days to ship out .

    Shipping Methods

    You can choose the preferred shipping method on the cart page during the checkout process. We offers 3 international shipping methods:

    1. Airmail – Free untracked economy shipping via national postal services (HK Post, Singapore Post, China Post, PostNL, Swiss Post, Sweden Post, USPS, Royal Mail e.t.c.)
    2. Airmail Registered – Tracked shipping via national postal services (HK Post, Singapore Post, China Post, PostNL, Swiss Post, Sweden Post, USPS, Royal Mail e.t.c.)
    3. Expedited Shipping – Express shipping with courier delivery (DHL, UPS, FedEx, TNT)

    Delivery Time

    Airmail and Airmail Registered Area Estimated Delivery Time
    United States, Canada 7-25 business days
    Australia, New Zealand, Singapore, United Arab Emirates 10-25 business days
    United Kingdom, France, Spain, Germany, Netherlands, Japan, Belgium, Denmark, Finland, Ireland, Norway, Portugal, Sweden, Switzerland 10-25 business days
    Italy, Brazil, Russia, South Africa 10-45 business days
    Other countries 10-35 business days
    Expedited Shipping 3-10 business days to Worldwide

    Note: If you choose an expedited shipping, please remember to leave a valid contact number, this is required for expedited shipping’s courier delivery.

  •  Returns & Refund

    Last updated October 05, 2022

    Returns

    If you are not completely satisfied with your purchase for any reason, you may return it to us for a full refund within 15 days from delivery date. All returned items must be in new and unused condition, with all original tags and labels attached.

    Return Process

    To return an item, please email our customer service at sales@alexnld.com to obtain a Return Merchandise Authorization (RMA) number. After receiving a RMA number, place the item securely in its original packaging, and mail your return to the following address:

    Alex NLD
    Attn: Returns
    RMA #
    HaGiborim St 8
    Tiberias, 14388
    Israel

    Please note, you will be responsible for the return shipping charges. We strongly recommend that you use a trackable method to mail your return.

    All customers should contact us and obtain Return Merchandise Authorization (RMA) number before sending anything to us. We will not be responsible for returned item(s) without notifying us in advance.

    Refunds

    After receiving your return and inspecting the condition of your item, we will process your refund to the credit / debit card or PayPal account which was used to place the original order.

    Please allow at least seven (7) days from the receipt of your item to process your refund. Refunds may take 1-2 billing cycles to appear on your credit card statement, depending on your credit card company. We will notify you by email when your refund has been processed.

    Exceptions

    If an item is found damaged or defective on receipt, we kindly ask you to contact us within 15 days from the delivery date to arrange a refund or exchange without physical return of the item.

    Please provide us with following:

    1. Photos of the front and back sides of the packaging box;
    2. A photo, video or screenshot of the defective item or the defective part of the parcel.

    Our customer service team will communicate with you to arrange a refund or reshipment without physical return of the item.

    Warranty & Repair service

    If any of the items you have purchased from us is found defective within 1 year from receipt, you are entitled to a repair under warranty. Please kindly provide us with evidence photos or videos of the defective item. After providing such information to our Customer Service team  and the problem is acknowledged, you can send the items back to us for a repair.

    Note:  Please be aware, we do not cover the cost of the returns fees in  warranty & repair service.

    Order Cancellation

    If you want to cancel an order within 24 hours from confirmation of the payment, you will be entitled to a full refund. It is still possible to cancel an order after 24 hours, provided that it has not yet been shipped. If an order has been shipped, it’s impossible for us to cancel or modify it anymore. If you still want a refund, you required to return the item on it’s arrival.

    Questions

    If you have any questions concerning our return policy, please contact us at:

    +972 054-536-2888
    sales@alexnld.com

     


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Introduction:

SA818 is a cost-effective integrated professional walkie-talkie module with built-in high-speed microcontroller, high-performance RF transceiver chip and RF power amplifier, and provides standard TTL serial port to communicate with the module, which can quickly and easily set the relevant parameters of the module and Transceiver function for control. Users only need to connect an audio amplifier, microphone, and speaker to this module to work as a small walkie-talkie. The simplified interface and ultra-small size make this module widely available, and can be easily and quickly embedded in various handheld devices to improve the overall performance of the terminal products.

Feature:

UHF band 400~480 MHZ
VHF band 134~174 MHZ
Transmit receive frequency independent
Bandwidth 12.5 KHz
Output power up to 1W
Open distance is 4-5 km
High receiving sensitivity: -124 dBm
Highly integrated small volume
38-level CTCSS analog sub-audio code
166-level positive phase, inverted CDCSS digital sub-audio
8-level squelch
8-level adjustable volume
High and low power options (500mW-1W)
Wide operating voltage 3.3-5.5 V
Built-in EEPROM, data power-down save
Stable with 1ppm TCXO crystal

Applications:
 
Small walkie talkie
Ignore the intercom system
Building community security system
Outdoor sports products
Audio monitoring system

Parameter Test Conditions MIN. Typical MAX. UNIT
Operating voltage range   3.3 4.2 5.5 V
Operating temperature range   -30 25 70
Current consumption
Sleep current     ≤1   uA
Receiving current     60   mA
Emission current (high power)     650 750 mA
Emission current (low power)     450 550 mA
Emission frequency parameter
Operating frequency range UHF  400   480 MHZ
Operating frequency range VHF  134   174 MHZ
Transmit power (high power) @VCC=4.0V 28 29.5 31 dBm
Transmit power (low power) 25 26.5 27 dBm
Modulation sensitivity @1.5Khz/2.5KHZ frequency offset   10   mV
Audio modulation distortion @1.5Khz/2.5KHZ frequency offset   2 5 %
Signal to noise ratio @1.5Khz/2.5KHZ frequency offset 38 40 45 dB
Adjacent channel power @12.5K offset   -60dBc   dBm
CTCSS modulation frequency offset   0.35 0.5 0.75 KHZ
Receiving radio frequency parameter
Receiving sensitivity 13dB output voice signal ratio   -124   dBm
Receive signal to noise ratio @1.5KHZ frequency offset 45 50   dB
Audio output amplitude     700   mV
Audio output impedance     200   OHm


Pin number Pin definition Description
1 Audio ON Audio power amplifier control, active low
2 NC Empty foot
3 AF_OUT Audio output
4 NC Empty foot
5 PTT Transmit/receive control pin, “0” is transmit; “1” is receive, default receive mode
6 PD Module sleep enable, "0" or floating is dormant; "1" is normal operation
7 H/L RF high and low power control; grounding is low power and floating is high power.
8 VBAT Connected power supply
9 GND Ground
10 GND Ground
11 NC Empty foot
12 ANT RF input / output pin (connected to 50 ohm antenna)
13,14,15 NC Empty foot
16 RXD Serial port receiving data port
17 TXD Serial port send data port
18 MIC_IN Microphone signal input

Package includes:

1 x SA818 Wireless Walkie Talkie Module


















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