DC 3.7V 5V 3W Digital Audio Amplifier Board
Bluetooth version: This Bluetooth version is 4.2. Compatible with all mobile phones and Bluetooth adapters on the market. The open transmission distance is about 15 meters. Supports automatic connection back to already paired devices and automatically plays music.
Warning: The charging interface of this product is in current-limited charging mode, without charging management! For the safety of your life and property, please be sure to use the lithium battery with protective plate produced by the regular manufacturer. If the loss is caused by improper use, the company will not bear any responsibility!
Note: This product will automatically shut down after 10 minutes in standby mode, you need to power on again!
Delivery list: motherboard + plug-in
Instructions for use:
1. Bluetooth version 4.2
2. Support USB sound card, free drive, plug and play (normal lithium battery power supply).
3. This product has its own dual 3W power amplifier circuit. Do not use another amplifier! The output of the two amplifiers cannot be connected in parallel or the negative poles are connected together, otherwise the power amplifier chip is damaged.
4. Two 2-8 ohm, 3-10W speakers can be connected separately,
5. The maximum working current is 5V2A. It is powered by a regulated power supply of 5V2A or above, and the sound quality is better!
6. It is recommended to use 3.7V lithium battery (lithium battery needs to have protection board!) Comes with USB charging port for lithium battery charging, USB port can be used as power supply or 5V adapter power supply. Can not use dry battery, charging treasure, multi-function Power supply with unstable voltage and current such as transformer!
7. When the Bluetooth board is installed, try not to be close to the metal parts, so as not to affect the transmission distance.
|Dimensions||4 × 2 × 1 cm|