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DF Alarm Disc brake Lock Motorcycle lock alarm Bike Anti Theft Security Bicycle disc lock alarm

Note: Please be cautious and check with your supplier if this product is for virus protection purposes and if the coronavirus (COVID-19) will affect your order.
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Quick Details

Place of Origin: Zhejiang China
Customized service: Support
Size: 88mm(L)* 33mm(W)* 60mm(H),88mm(L)* 33mm(W)* 60mm(H)
Color: Red/Yellow/Black/Chrome/Green/Brushed
Factory or trading company: Factory
Material: Zinc alloy
Model Number: 8303
Suitable for: Motorcycle,Electric bicycle ,Bike,etc.
Brand Name: DF
Sample service: Support
Alarm decibel: 110dB
Package: Blister packaging /carton box packaging
Net Weight: 510g
Key: 3 Keys
Packaging Detail: Blister card packaging/Color box packaging
Selling Units: Single item
Single package size: 19X12X5 cm
Single gross weight: 0.65 KG
Package Preview:,
Ningbo Defend Locks Co., Ltd.
Gold Supplier
Response Rate
On-time delivery rate
US$ 4,000+
R&D staffs
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Product Description
Alarm Disc Brake Lock
The alarm disc brake lock is an upgraded product of the ordinary disc brake lock. Compared with the ordinary disc brake lock, the alarm disc brake lock has a vibration alarm function. When the vehicle is locked, the lock body or vehicle is vibrated, and the alarm disc brake lock will emit an alarm sound of 110 decibels.
Certifications & patents



Details Images
Zinc Alloy
85mm(L)* 33mm(W)* 60mm(H)
3 Keys
Alarm decibel
Blister card packaging/Carton box packaging
Suitable for
Motorcycle/bicycle/E-bike etc.
Ergonomic design

Press to lock


Product Usage
    • Product usage introduction

   Press the lock core,it will be locked and you will hear the sound "Du",which means it is coming into the alarm status,after 5 seconds, When the lock or vehicle is vibrated,the lock will give an alarm "Du Du Du" three sounds. when the lock is vibrated again,it will give an alarm and keep alarm with serial vibration. Each alarm will last for 10 seconds. Use the key to open the lock,the alarm will stop at once.
  • Use effect display

Press the lock core to lock, simple and fast, vibration alarm function, better anti-theft effect.
Use showcase
1.Packaging service:

1. Blister card packaging(Neutral packing)
2. Carton box packaging:
1.Customers can choose different accessories according to their needs.
2.Accessories and locks are packed together in the box.
3.Click on the picture to get accessory information.
2.Customized service:
1. We can print LOGO according to customer needs.
2.Usually we use English stickers by default, customers can customize stickers, but need to pay additional fees.
3.Usually we use English packaging by default, customers can customize packaging and patterns, but need to pay additional fees.
4.We can provide packaging solutions and design solutions according to customer needs.
3.Sample service:
Door-to-door express service:
We can provide samples according to customer's requirements, customers need to pay the sample fee and express delivery fee.
Company Introduction
  Ningbo Defend locks Co., Ltd was founded in 2016, Always focus on R & D, production and sale different types of motorcycle locks, bicycle locks and door locks, especially motorcycle alarm locks, which is located in Ningbo port with convenient transportation.
   Since the company was founded, In the spirit of “ Pursuit of excellence, continuous innovation”, Continuously develop products to meet market demand, optimizing and improve product structure and performance, satisfy customer requirement. Our products are sold to Europe, Middle East, Africa, South-East Asia, America and all over the world. We also have a high proportion in domestic
  “Integrity, efficiency, innovation and win-win” are the consistent tenet of the company's operation .”Quality first, customer first” Is the business philosophy we always adhere to, Build brand with integrity, high quality wins the market . DF locks welcome domestic and oversea friends to visit and guide, we will make great efforts to serve you in any way.

Our Services & Strength
Ningbo Defend locks Co., Ltd includes R&D,produce and sales,All the products have our own patents, Some of products got through Europe CE certificate,Every process of our products is strictly controlled. Our products are sold all over the world.We also have a high proportion in domestic market.
Quality Inspection
Ready to ship
Q1.Are you a factory or a trading company?
A:We are a factory specializing in the R & D and production of various types of locks, located in Ningbo City.

Q2. What is your terms of packing?
A: Generally, we pack our goods in neutral white boxes and brown cartons. If you have legally registered patent, we can pack the goods in your branded boxes after getting your authorization letters.

Q3. What is your terms of payment?
A: TT/Western Union/Trade Assurance 30% as deposit, and 70% before delivery. We'll show you the photos of the products and packages before you pay the balance.

Q4. What is your terms of delivery?

Q5. How about your delivery time?
A: The specific delivery time depends on the items and the quantity of your order.Generally we have some in stock.

Q6. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.

Q7. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost and the courier cost.

Q8. Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery.

Q9: How do you make our business long-term and good relationship?
A:1. First of all, we are a factory without middlemen to earn the price difference; second, our product quality has its own strict control; third, we have enough supply to provide customers with stable supply.
A2. We respect every customer as our friend and we sincerely do business and make friends with them,
no matter where they come from.