Product: LM317 LM337 Adjustable Filtering Power Supply AC/DC Voltage Regulator ±1.25-37V
Features:
- DIY kit, requires soldering of all parts
- Stable performance
- Output voltage range can be changed by adjusting the resistance value for precision control
- Suitable for use in pre-amp, headphone amp, etc.
- Output: DC±1.25-37V adjustable
Package Contents: 1PCS LM317 LM337 Adjustable Filtering Power Supply AC/DC Voltage Regulator ±1.25-37V

Refund:
- All packages need to wait 30 days for delivery (7-10 days for US)
- If the item is defective or unsatisfactory, it can be returned within 14 days for a replacement or refund, provided it is in factory condition
- Return address should be double-checked before returning the item
- Defective items can be returned within 12 months for a new replacement

About Shipping:
- Seller strives for 100% customer satisfaction and requests immediate contact before giving neutral or negative feedback
- PayPal payment accepted, but only to the address provided on eBay
- Payment must be received within 5 business days of auction closing
- Special requests (e.g., colors or size) should be noted in PayPal during payment, but requests cannot be accepted after 24 hours due to instant processing and same-day dispatch.

We keep a close eye on consumer needs,offering continual innovation and product development and an ever-changing core product range.Each product undergoes rigorous development and testing,keeping quality and longevity in mind.In addition,our trained customer service team work hard to ensure that any queries are dealt with efficiently and strive to ensure that you are always provided with the highest level of customer support.

Any questions,please contact us through eBay message or e-mail,We will reply within 1-2 business days(public holidays not included).
Working time:Monday-Friday 9:00 AM-5:30PM(Beijing)

A complete and correct shipping address is essential.
Customers with shipping addresses outside of the U.S.are responsible for all duties and import taxes.Please contact your customs for information.
For any further information about shipping,please contact our customer service team.

We are happy to be able to offer our customers 60 day returns on our products.All items can be returned and a refund will be issued,provided they are returned within 60 days of receipt of purchase.In the unlikely event that you are not happy with your purchase please do not hesitate to contact our customer services team.

We offer at least 1 year guarantee on all of our products.