2CH 20W Power Bluetooth HiFi Stereo AMP Amplifier Bass Booster For Car Home MP3

2CH 20W Power Bluetooth HiFi Stereo AMP Amplifier Bass Booster For Car Home MP3
  • Продавецflimmer.com
  • Список ценUS $20.42piece
  • Продажная ценаUS $20.42piece
  • ДоставкаБесплатная доставка
  • Рейтинги4,3 (621)

Oписание продукта


1)Wide Input Voltage:
Input DC Voltage Range 5-15V

2)  Self-oscillation Elimination:
The system detects self-oscillation, first reduces the link gain, then detects the loop, and finds that the self-oscillation is eliminated, the system returns to normal working state, otherwise, the power is turned off to prevent interference signal.

3)  Inactivity Mode:
When no user calls, the device works in standby mode, the uplink power amplifier is switched off, and the static power is decreased by 30%, so as to achieve the purpose of energy saving.

4) AGC (Automatic Gain Control):
When the downlink output signal is too strong or self-oscillated, the uplink and downlink can automatically reduce the gain and reduce the interference signal.

5) Automatic Power Shut-down:
When the self-oscillation happens, and the link attenuation value reaches 20dB, the MCU sends out the instruction and shut-down the PA.

6) ALC(Automatic Level Control):
Automatically adjust the output gain down to optimal figure while the output gain is above the optimal figure by the ALC circuit, this can greatly optimize the calling quality, data transfer quality, avoid the signal self- oscillation, and also very much reduce the interference to the cell tower, even if your house is very close from the cell tower, you don\'t need to worry about the interference and the trouble caused.

Frequency Range: Band 28
Band 28: Uplink: 703 ~ 748MHz Downlink: 758 ~ 803MHz
Max.Gain: 70dB
Automatic shut down: When self – oscillate happened or attenuation value reaches 20dB, power supply is shut down.
I /O Port: SMA-Female
Dimensions: 115mm*68mm*16mm
Power Supply: Input AC100~240V 50/60Hz,output DC 5V


LED  Indicator:
1.Continuous GREEN @normal;Twinkly GREEN @input signals may be not enough.
2.Continuous YELLOW @ stronger input signals, AGC is working;Twinkly YELLOW@ self–oscillation happen, AGC is working, the attenuation value is more than 12dB.
3.Continuous RED@ power supply is shut down.


1. This booster only works for LTE 700MHz. 0-1 bar outside signal may not be suitable for using it.Before ordering,please check your local signal frequency by calling network operator or checking on some sites.
2. For installation, you are supposed to pay attention to the following points:
1) There is seperate wall between indoor and outdoor antennas to make two antenna signal not interfere with each other.
2) To avoid interference, please make the distance of indoor and outdoor antenna more than 10 meters, let them not pointed at each other.


1. 1 * 70dB Booster
2. 1 * Power Adapter
3. 1 * Mounting Screw Kit
4. 1 * English User Manual
5. 1 * 3dBi Indoor Right Angle Antenna
6. 1 * 8dBi Gain Outdoor Directional Yagi Antenna with 50 Feet Cable


Before ordering:wrong frequency and only 1 bar or 0 bar outside signal may make booster not working. Please check related frequency sites or call network operator to make sure the right local frequency from base station.
Site to Check Australia Frequency:https://oztowers.com.au/Home/Query
Site to Check USA Frequency:https://www.wirelessadvisor.com/
Site to Check Other Countries’  Frequency:http://www.worldtimezone.com/4g.html
After Sale:If any problem with the booster, please contact  the customer service and we will try our best to solve


1. Three Months Free Replacement
2. 2 Years Manufacturer Warranty
3. Fast Handle time & Free Shipping
4. Support Wholesales,More Units More Discount


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1. Payment must be made within 3 days of order.
2. Most of the time, your order will be shipped in 2 business days upon clear payment(holidays or weekends not counted). 
3. If you want to lower Customs declaration value, please leave message on order but you need to assume the risk at the same time.We are not responsible for any customs duty incurred at foreign customs.
4. Please make sure you leave the correct address. We are not responsible for any failed delivery due to incorrect,unclear,incomplete addresses.
5. If you think the shipping fee is wrong, please contact us.

1. Before buying, please read the item detail description. Please make sure what you are buying is the correct item you want.  we are not responsible for incompatibility issues or damage to your machine.
2. We  accept faulty returns only within 10  days upon item received  if the item is returned in the same exact condition (this means not used or fitting attempted).  We will send you a replacement without extra charge, or offer refund after we receive the defective item.

1. It is very important for you to check the possible messages in your email or in the Aliexpress order first three days after payment, because there is very probably information that is waiting for you to reply, in order to avoiding delaying sending out the package.
2. Any other questions please don\'t hesitate to contact us. We will reply you soon.
3. If you are dissatisfied for any reason, please don\'t be quick to leave negative/neutral feedback. We work hard to make sure every customer 100% satisfaction.