XINGYHENG 2Pcs Micro 4.2 stereo Power Amplifier Board F 5W+5W with Charging DIY Refit Speaker Audio Receiver Module Amplifier Board Converter for DC Power supply Audio System DIY Speakers

Description

About us:
Bluetooth version: This Bluetooth version is 4.2. Compatible with all mobile phones and Bluetooth adapters.
Support USB sound card, drive-free, plug and play (normal lithium battery power supply).The transmission distance in the open area is about 15 meters. Support to automatically connect back to the paired device and play music automatically.
Warning: The charging interface of this product is a current-limiting charging mode without charge management!
For the safety of your life and property, please be sure to use a lithium battery with a protective plate made by a regular manufacturer.
Note: This product will automatically shut down after 10 minutes in standby mode, you need to power on again!

Instructions for use:
1.Bluetooth version 4.2
2. Support USB sound card, driver-free, plug and play (under normal lithium battery power).
3. This product already comes with dual 5W power amplifier circuit. Do not use another power amplifier! The output of
two power amplifiers cannot be connected in parallel or the negative poles are connected together, otherwise the power amplifier chip will be damaged.
4.Can be connected to two 2-8 ohm, 3-10W speakers, 4 ohm 5W and 4 ohm 10W speakers. The output is stereo.
5.Maximum working current is 5V2A, using 5V2A or above power supply, the sound quality is better!
6. It is recommended to use a 3.7V lithium battery (the lithium battery needs a protection board!) It comes with a USB
charging port for charging the lithium battery. The USB port can be used as a power supply or a 5V adapter. Do not use dry batteries, power banks, multi-function Power supply with unstable voltage and current such as transformer!
7.When the Bluetooth board is installed, the Bluetooth antenna should not be close to the metal parts as much
as possible to avoid affecting the transmission distance.
Package including: 
2 x Motherboard
6 x Plug-in cable