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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Description:
The voltage standard uses the LM399 for Linear Technology as the reference element, with two sets of voltage outputs 6.95V/10V. 6.95V is the direct output of LM399. 10V is 6.95V outputted to 10V after being boosted by a precision op amp.
The LM399 reference IC is used as a reference IC in many 6 u00bd digit multimeters and is a constant temperature reference. Compared with 4 u00bd digit references such as AD584 and BQ588, its temperature coefficient is much smaller, and basically does not exceed 0.5PPM/°C. It can be used as a 5 u00bd digit or 6 u00bd digit voltage reference.
Features:
USB 5V power supply: convenient for power supply
Small size and light weight: convenient for transfer between reference branches
<0.5PPM/°C for 6.95V; <1PPM/°C for 10V
Output adopts 4mm standard safety banana socket
Maximum noise level: 7uVRMS
Product size: 93x70x28mm
Net weight: 84g
Electrical Performance Parameters:
Power supply voltage: 5V 1A
Power supply interface: Type-C
6 u00bd digit precision warm-up time: more than 1 hour
Output voltage: 6.95V/10V
Voltage calibration instrument: DMM7510 7 u00bd digit multimeter for KEITHELY
Roymall C.o.
Free Gift
Shipping Policy
Return Policy
Coupon Code
Direct purchase from the factory 
Tools
Measurement & Analysis Instruments
Spectrum Analyzers
