Hi guys,
Wanted to warn you not to buy anything from
Grace Jin
Jiangsu Daao Optoelectrical Co.,Ltd. (Factory)
Add: No.288 Huaqiao Town ,Kunshan of Jiangsu Province 215332 China
Tel:+86-512-57972027
Mobile: +86-13671701504
Email: jsdaao@gmail.com
MSN : zhangfan800512_vip@hotmail.com
Skype: kathyzhang998
Website: Frontpage--Jiangsu Daao Optoelectrical Ltd
Here's my story, I contacted them about buying 1200 lasers with exact specifications - fixed focus, dot diameter <0.5mm at a distance of 150mm. They said that they can manufacture such lasers at 2.9$/piece and offered 4 samples for 125$. After I made the payment, here's what I received:
The quality appears to be extremely poor.
1. green lasers came with the V+ wire not attached, it was just laying next to the laser. connecting it to any of the soldering pads did not work.
2. one of the red lasers looks used and is missing some threads, but also produces a very weak dot, about <1mw, and 2mm in diameter.
3. the second red laser produced a very poor-shaped dot, about 2-3mm in diameter.
Of course, the seller stopped communicating.
BTW, such laser modules retail on aliexpress for 2.5$/piece.
Wanted to warn you not to buy anything from
Grace Jin
Jiangsu Daao Optoelectrical Co.,Ltd. (Factory)
Add: No.288 Huaqiao Town ,Kunshan of Jiangsu Province 215332 China
Tel:+86-512-57972027
Mobile: +86-13671701504
Email: jsdaao@gmail.com
MSN : zhangfan800512_vip@hotmail.com
Skype: kathyzhang998
Website: Frontpage--Jiangsu Daao Optoelectrical Ltd
Here's my story, I contacted them about buying 1200 lasers with exact specifications - fixed focus, dot diameter <0.5mm at a distance of 150mm. They said that they can manufacture such lasers at 2.9$/piece and offered 4 samples for 125$. After I made the payment, here's what I received:
The quality appears to be extremely poor.
1. green lasers came with the V+ wire not attached, it was just laying next to the laser. connecting it to any of the soldering pads did not work.
2. one of the red lasers looks used and is missing some threads, but also produces a very weak dot, about <1mw, and 2mm in diameter.
3. the second red laser produced a very poor-shaped dot, about 2-3mm in diameter.
Of course, the seller stopped communicating.
BTW, such laser modules retail on aliexpress for 2.5$/piece.
Last edited: