Greatlizard Bluetooth 5.0 FM Transmitter Car Player Kit Car

Mobile phone chargers can be roughly divided into travel chargers, cradle chargers and maintenance chargers. Generally, users mainly contact the first two. And the most sold on the market is the travel charger.
There are also various forms of travel chargers. The common ones are the cheap duck egg-shaped miniature travel charger, the ordinary desktop card board charger, and the high-end desktop charger with crystal display. Mobile phone charger, also known as: mobile phone adapter, is actually composed of a stable power supply (mainly regulated power supply, providing stable working voltage and sufficient current) plus necessary control circuits such as constant current, voltage limiting, and time limiting. The output parameters marked on the charger (referring to the line charger): such as output 5.0V/1A, output 5.0V/1500mA-11200... refers to the relevant parameters of the internal regulated power supply. Understand this truth, you will know that a (good quality) mobile phone charger is easy to change into a good quality regulated power supply.
The chargers of lithium-ion (li-ion) batteries commonly used in mobile phones use a constant-current and voltage-limited charging system, and the charging current is generally around C2—that is, the charging rate is two hours. For example, a 500mAh is charged at 250mA in about two hours 4. Constant voltage charging after 2V.
The lion is not suitable for the -DV/DT detection fast charging method used by the NIMH advanced fast charger, because the lion has a strict limit on the charging current. Lithium ion (Li+) is very active, and high current charging is prone to danger. The general user contacts are mainly the first two. The most popular travel chargers on the market are travel chargers. There are also various forms of travel chargers. The common ones include cheap duck-egg miniature travel chargers, ordinary desktop card board chargers, and high-end desktop chargers with LCD display. device. In view of the fact that most mobile phone users are non-professional users, the chargers basically have the function of full self-stop, and most of the travel chargers are fast chargers, and the charging time is about 1-3 hours. Many chargers on the market advertise that they are controlled by microcomputers, including some very cheap duck-egg-type miniature travel chargers. In fact, strictly analyzed from the charging circuit, only a small number of chargers can be truly controlled by microcomputers (MCU control). .
Some manufacturers claim to be "microcomputer control" when they use integrated blocks on the charging circuit. In fact, many low-cost design integrated blocks are cheap op amp integrated blocks, while some dedicated charging control integrated blocks have higher unit prices. , generally used in relatively high-end or brand-name chargers. So we can't trust the so-called microcomputer control, especially the cheap products. Many products are similar in appearance but have very different internal circuits, and their performance is also very different.Wireless In-Car Bluetooth FM Transmitter MP3 Radio Adapter Car Fast USB ChargerProduct DescriptionThis deice lets you stream music and calls directly from your Bluetooth device to your car FM stereo system. The built-in microphone provides you with hands-free function. It also features a USB the at lets you stream MPS files to your car stereo system and charge your phone simultaneously. Can be paired with any Bluetooth enabled devices. Product Features100%and high quality.Multifunction: constructing with FM transmitter, hands free talking, FM radio, car charger and FM displayer.Hands-free phone call: built-in microphone, noise and wind suppressed by CVC technology create full duplex sound quality, allow you to make clear calls.Wider range: full FM radio frequency ranges from 87.5 to 108.0MHz, you will get a frequency without interference more easily and do not have to keep re-tuning it.Dual USB ports: One is designed for transmitting and reading the MP3 files automatically, the other supports charging compatible with Bluetooth enabled devices, like iPhone, iPad, tablet, Samsung and other smartphones.Monitor status: detect and display the voltage of car when power on.Multi protection: overcurrent protection, overvoltage protection, short circuit protection, overpower protection, over temperature protection.Memory function: automatically connect to its memorized paired Bluetooth device when power on. How to Use1.Plug FM Transmitter into the socket.2.Turn your car FM radio station and search the frequency (87.5MHz~108.5MHz) same as the device with name of T20.3.Long press the function key for 2s to enter the frequency-adjustment interface. Rotate the function key or fast-forward key and fast-backward key to adjust the emission frequency. Then long press the function key for 2s to confirm and exit.4.Match it to the transmitter.Button functions:Play/pause: press call button to play, press again to pause.Adjust volume: long tap right volume key to up the volume, long tap left volume key to down the volume.Select frequency: long press call button 2s enter main menu, rotate knob to adjust, click to confirm. Tap right volume key to increase frequency, tap left volume key to reduce frequency.Select music: press right volume key to play song, left one to play previous song.Answer/end call: press call button to answer call, press again to end call; click left volume key to reject the incoming call, double click call button to redial. SpecificationType: Handsfree Bluetooth Car FM Transmitter KitBluetooth version: V3.0+EDRSensitivity: -42db+/3db 360Voltage: 5V+/-0.5Working current: 45mA (max)Standby current: 25mA (max)Frequency: 2.402-2.480ghzEffective range: 5VSensitivity: -92dBmRF output: 4dBmFM: 87.5MHz-108.0MHZTransmitted power: 87 dBuv/107 dBuvEffective range: 5mDimension: 1.85*1.97*3.43in (47*50*87mm)Weight: 1.26oz (36g) Package Includes1 x Bluetooth Car FM transmitter Kit1 x User Manual