Car Backseat Wireless Bluetooth Headset HD Speaker Adjustable Headphone for iOS Android Phones 2019

Car Backseat Wireless Bluetooth Headset HD Speaker Adjustable Headphone for iOS Android Phones 2019
  • Продавец
  • Список ценUS $20.09piece
  • Продажная ценаUS $20.09piece
  • ДоставкаБесплатная доставка
  • Рейтинги4,2 (736)

Oписание продукта

Top grade 250 ohm Headphone DIY speaker unit Tesla technology 44mm 50mm Speaker Unit for DIY headset excellent sound

We also don\'t know this speaker origin brand and model, but I can sure the headphone offcial price over $1000.

We have limite quantity of these speakers, very rare.


Tesla II unit, Golden Tesla, not silver color Tesla unit. Solder joints are small, welding has certain difficulty, we will test all speakers before sent to customers, NOTE: we do not accept any reason to return or exchange after welded.

The unit diameter is 44MM, free 2pcs 44mm to 50MM adapter ring, so the speakers can be used as 50mm size unit.

Important note: 

These speakers with very strong magnetic and must be very careful when soldering, Please do not put the two speakers too close after take out from the plastic holder. Because the magnetic too strong, please make sure the speaker don\'t close to any metal that with iron, when you solding the speakers, make sure you have something else hold the speaker firmly. We are not responsible If you damage the speaker diaphragm by careless.  The speakers will be packed in safe hard box to avoid damage in transmit.

Unit: Tesla technology II{Titanium plating}
Outer diameter: 44mm

Free a pair 44mm to 50mm adapter ring
Frequency response range: 4-50000Hz
Sensitivity: 118dB @1KHz
Impedance: 250Ω

Tesla technology

Based on the newly designed drive unit and the magnetic field-optimized ring magnet, it can provide more than 1.2 Tesla drive power, reaching a new level of technology, which is twice the conversion capacity of the traditional headphone unit. Thanks to this enhanced magnetic field, the voice coil will be more compact while still providing very high efficiency. The three-layer composite diaphragm provides a highly accurate frequency response and guarantee, and with high-intensity magnets, you hear transparent, distortion-free sound.

What is meant by "Tesla technology"?

By Tesla technology, we mean a series of measures carried out on our sound transducers in relation to their design and the materials used. Due to these measures, sound transducers with this technology differ fundamentally from conventional ones. The most striking feature is a very strong annular magnet made of neodymium.

Headphones that have sound transducers that use Tesla technology sound cleaner, more transparent and more wideband and are significantly more efficient, which is particularly beneficial on devices with low sound pressure levels. In addition, under the same conditions they are louder than most conventional headphones.


What are the advantages of Tesla technology?

Headphones with sound transducers with Tesla technology sound louder, have less distortion, exhibit a wider frequency response and sound more precise. In addition, they can reproduce higher sound levels without any distortion. Music therefore sounds cleaner and more transparent, the stage of instruments becomes more tangible and the output of the device is used even better. Higher sound pressure levels can also be achieved.



1.    Full payment must be made within 7 days after placing your order.

2.    Buyer is responsible for any possible tax and/or duty charged by their country customs.


Shipping and handing

China Post normal airmail, China Post epacket, HongKong Post airmail, and EMS is our preferred shipping service, also we offer other shipping service via TNT,DHL,Fedex and UPS,etc.(Addtional high shipping cost maybe required) 

NOTE: we never do business with Illinois and we cannot ship anything to Illinois,USA.



1.    If you are not satisfied with your purchase, please contact us to exchange the item or return to get refund. The buyer is responsible for all further shipping fees if not our fault.

2.    Buyer must contact us within 7 days after delivered if they wish to exchange defective or incorrectly shipped items.



Please contact us before leaving any negative or neutral feedback, we will work with you to solve any problems.



If you are old customer maybe can get discount when you want purchase something again, please contact me if you are. Also we welcome wholesale business, for more products please contact us, thanks.