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Speakers are also called "horns". It is a very commonly used electro-acoustic transducer, which can be seen in sound-producing electronic and electrical equipment. A speaker is a transducer device that converts electrical signals into acoustic signals. The performance of the speaker has a great influence on the sound quality. The speaker is the weakest component in the audio equipment, and it is the most important component for the sound effect. There are many types of speakers, and they vary widely in price. Audio electrical energy produces sound through electromagnetic, piezoelectric or electrostatic effects that cause its cone or diaphragm to vibrate and resonate (resonate) with the surrounding air.

1. Differences in terminal delivery

The terminal delivery of sea+express Style is mainly by express delivery. Because there is no need to make an appointment、 the goods can be quickly warehoused、 and its advantages are very obvious in the logistics peak season. However、 Hika and its terminals are mainly delivered by truck. Truck delivery is inefficient and has many processes. Delivery of goods to Amazon requires advance booking、 which is inefficient.

2. Differences in channel services

The logistics service of sea+express Style is relatively good. It basically uses the direct shipping mode to transport goods、 which is highly efficient、 short in process、 and fast in efficiency. However、 the charges of Shanghai Style are also relatively high. The logistics service of Hika is relatively poor、 the freight transport efficiency is low、 the process is long、 the efficiency is slow、 and the transport goods will stop halfway、 but the cost is lower than that of sea+express.

If you have sent international postal surface mail packages、 you will know that the advantage of surface mail lies in its wide coverage、 many corners can be sent、 but it can be said to be the slowest logistics、 many times it can not be tracked、 and remember that there is no bottom in the process center. The delivery process of registered mail is more clear、 and it will bear certain responsibility for loss and damage、 so it is faster and safer. In terms of cross-border special line logistics、 it is also of similar significance. For example、 TODROPSHIPPING、 which specializes in e-commerce special lines、 has 5-8 working days for registered express mail to arrive in the United States. At the same time、 tracking inspection is supported. In some countries、 it can be re dispatched twice、 while ordinary mail takes 8-10 working days. Not only can it not be tracked、 but also there is no return or compensation service. When you are in a hurry、 if you cannot find a piece、 you just wait. Of course、 the cost of ordinary mail will be cheaper than that of registration.

Todropshipping focuses on batteries and its products cover: button batteries、 lithium manganese batteries、 nickel metal hydride batteries、 cylindrical lithium manganese batteries、 needle type lithium ion batteries、 dry batteries、 etc. Consult customer service for details