Return items will be accepted within 40 days when is the date of receiving the goods. Customized items cannot be returned or exchanged. Items bought with an e-gift card are exchangeable only; refunds are not applicable.
Free Gift
Welcome to Roymall, your professional website for purchasing premium department store gifts. We highly value and appreciate your support, and we want to express our gratitude by adding an extra touch of excitement to your purchases. When you shop with us, you not only get to enjoy high-quality products that enhance your lifestyle, but you'll also receive an exclusive free gift with every order you place. Ready to explore our collection and find your perfect gifts? Browse our selection of premium department store items, place your order, and look forward to the excitement of your free gift arriving alongside your purchase.
Shipping Policy
We will work hard to deliver items to you after receiving your orders and make sure they arrive safely. Delivery details will be provided in your confirmation email.In most cases, orders are processed within 2 days.Under special circumstances, it will be delayed as follows: When you place an order on Saturday, Sunday or public holidays, it will be delayed for 2 days..Normally, it needs 5-7 working days (Monday to Friday) without being affected by flight delay or other environmental factors..Because our shipping service is worldwide so the delivery times will depend on your location so it may need a few times and please wait patiently if you are in remote districts or countries.
1. Return & Exchange Policy
We only accept items purchased from roymall.com. If you purchase from our local distributors or other retailers, you cannot return them on our side.Final sales items or free gifts are not acceptable for a return.To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.After receiving return instructions from us, please package up your returned items and drop your package at the local post office or another courier. We will process your return or exchange item within 3-5 working days after we receive it. The refund will be processed and credited automatically to your original method of payment.No returns or exchanges can be accepted if the product was custom produced, including custom size, custom
color, or custom printed.Need more help, please contact us. service@roymall.com or Whatsapp: +447549870296
2.Refund Policy
You'll get a full refund or 100% store credit after we receive the returned package and check it. The refund will be processed and credited automatically to your original method of payment.Please note that shipping costs and any duties or fees are not refundable. The extra shipping costs are non-refundable once the package has been shipped. You are responsible for paying these fees and we’re unable to waive or refund them, even if the order is returned back to us.Once we received and confirmed your returned item, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.If you have any problems regarding the refund process, please contact us. service@roymall.com or Whatsapp: +447549870296
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Specifications: Main MCU Chip: STM32F103C6T6 (32-bit processor)Communication Module: Air780E LTE Cat.1 bisOperating Voltage: 5V (via Type-C + KF128 terminal)Dimensions: 62mm x 72.5mmWeight: 45gSleep Mode Current: Low power consumption (600uA)Two Relay Outputs: Rated for 10A/250VAC, 10A/125VAC, and 10A/30VDCNano SIM Slot: Flip design for easy installationConnectivity: UART communication with STM32Indicator: AIR780E network status LEDReset and User-Defined ButtonsIO pins: Fully exposed STM32 and AIR780E IO pins Features: 1. Reliable ConnectivityIntegrated Air780E module supporting LTE Cat.1 bis global communication ensures seamless internet connectivity, compatible with varied operators and networks.2. Low Power EfficiencyDesigned for efficiency, the development board's Air780E module operates with minimal power requirements, featuring a sleep mode that consumes as low as 600uA.3. User-Friendly SetupThe flip-style nano SIM card slot and onboard reset and function buttons allow for easy installation, configuration, and custom functionality development.4. Versatile Power Supply OptionsSupports 5V power input via Type-C interface or KF128 terminal for flexible and convenient powering solution.5. Comprehensive Interface ExpansionFully expanded IO ports provide robust GPIO options for integrating additional peripherals and tailored development applications. Package Included: 1 x STM32 4G Dual Relay Development Board with Air780E Module2 x 12P Single Row Pins
Roymall C.o.
Free Gift
Shipping Policy
Return Policy
Coupon Code
Direct purchase from the factory 
Electronic Components & Supplies
Module Board
Relay Module
