亚洲精品国产免费-亚洲精品国产理论电影网-亚洲精品国产精品国自产网站-亚洲精品国产第1页-韩国电影一区二区-韩国电影一区

compatibility

Although the compatibility of Bluetooth speakers is 100% compatible with existing Bluetooth devices, it is still necessary to check whether your broadcasting device supports Bluetooth before purchasing.

Transmission interval

The transmission interval of Bluetooth speakers is also a concern for us. The transmission interval of Bluetooth speakers is not related to the Bluetooth version, but mainly depends on the advanced level of skills. The standard transmission interval of PowerClass2 is 10 meters; The upgraded PowerClass1 increases the transmission interval to 100 meters and provides Hi Fi stereo sound. Generally speaking, the distance between a mobile phone and a Bluetooth speaker is not too far, and a safer transmission interval is about 10 meters or less. The Bluetooth speakers on the market all meet the 10 meter standard.

edition

When consumers purchase Bluetooth speakers, they often see numbers such as Bluetooth 1.1, 1.2, 2.0, 2.1, 3.0, 4.0, etc. These numbers represent different versions and also represent the anti-interference ability of Bluetooth speakers. In 2012, 2.0 was the most common, 3.0 was the new mainstream, and 4.0 was just launched. The different versions of Bluetooth are related to the quality of the received signal. The new version focuses more on overcoming noise interference. New versions are all compatible downwards, and consumers should consider price and demand when making purchases

Built in battery

Bluetooth digital speakers are equipped with built-in batteries, achieving true wireless connectivity. The quality of the built-in battery directly determines the playback time and service life of Bluetooth digital speakers. Before purchasing, please carefully inquire about the actual broadcast time and the number of repeated charging attenuation times. Advocate consumers to choose polymer lithium batteries as much as possible when choosing Bluetooth speakers, as there is no risk of explosion.

Battery type:

1) Polymer battery

Advantages: Safe and efficient, with no explosion hazards in the soft package.

Disadvantages: There are many varieties, and the price difference between pure cobalt (good) and pure manganese (poor) polymer batteries is several times.

2) 18650 battery

Advantages: Excellent performance, able to reach superior levels of charging and discharging (mostly used for laptop batteries), with explosion-proof maintenance

Disadvantage: There are many dismantled and old batteries. The price difference between good and bad 18650 batteries is 5-10 times that of the same battery

3) Aluminum shell battery

Advantages: The price is very cheap

Disadvantage: Poor performance. Without any explosion-proof measures, the consequences of an explosion are unimaginable.

Battery maintenance board:

1) The battery maintenance board for miscellaneous batteries performs poorly in charge and discharge maintenance, and is unstable, which can easily damage the battery cells and electronic devices.

2) Unstable current output not only affects sound quality, but also causes significant current sound.

A high-quality battery can still reach 80% of its initial capacity after 500 charges and discharges. Poor quality batteries cannot even reach 50% of their initial capacity after 100 charges and discharges.

Article source: LED Bluetooth audio system http://www.www.zaozhijixie.net.cn/