DAB introduction:
 
1. Full name of DAB:
    Digital Audio Broadcast, digital audio broadcasting, is the third generation of broadcasting after AM and FM traditional analog broadcasting - digital signal broadcasting, which provides sound, CD and unlimited additional data services with near-CD quality, with anti-noise, Anti-interference, anti-wave propagation fading, suitable for high-speed mobile reception, etc., to ensure the quality of received signals when fixed, carrying and moving
 
2. Differences from FM/AM:
    The biggest difference between DAB and traditional broadcasting (FM, AM), in addition to DAB's CD quality transmission quality and technology, DAB also has the ability to receive multimedia information, including text, data, pictures, images, and even real-time information updates. Therefore, the application of DAB is not limited to the audio broadcast service (Audio Broadcast) service, but more importantly, the data information audio and video service (Data Broadcasting) service.
 
3. DAB use area:
     DAB was first used in a small area in Europe. It has been developed for many years. It was originally limited to enthusiasts. In recent years, the number of countries has increased, and the number of radio stations that can be listened to has increased significantly. European countries have developed a shutdown plan to simulate FM/AM broadcasting, so DAB is developing very fast. According to the information provided on the official website, the country areas that have been opened for installation are shown in the right figure. (According to the actual sales situation: the current main sales area is generally in Europe, such as the United Kingdom, Germany, Norway, etc. Among them, Norwegian FM has been shut down in 2017, the demand is very strong)
 
4. Car DAB features:
    This product is mainly used in cars that do not have DAB function, including existing models in the market and new cars without DAB function. Plug in the cigarette lighter interface, receive the DAB signal through the antenna, and use the FM transmission function of this product to listen to the ordinary FM radio of the original car. Suitable for all models, as long as a bit of smoke can be used. The operation is extremely simple, and the original car audio system can be upgraded to DAB digital radio at the lowest cost without modification.

Specification:

1. FM frequency 87.5-108.0MHz 
2. Auto Power-off Memory function 
3. Dual USB charger. QC 3.0(3A)+1A output 
4. LCD display 
5. QPSK modulation mode 
6. DAB band 174.928Mhz-239MHz 
7. Supports DAB/DAB+ 
8. Supports Bluetooth hands-free 
9. Supports incoming call number display 
10. Supports A2DP 
11. AUX-OUT function

Rated working voltage:12V~24V
Limit working voltage:9-26V
USB1 output:5V/1A
USB2 output:QC3.0
Working Temp.:<60ºC
Music format:MP3
TF Card:1G-32G
Bluetooth Version:4.2+EDR
Modulation systerm:QPSK
DAB Freq.:177MHZ-240 MHZ
Auto power-off memory:Yes
FM Freq.:87.5MHz-108MHz
Emission Distance:0.5-2M
Bluetooth emission distance:Less than 10M