Product Features:
1. Supports wide-range DC 3.7V-5V power supply, compatible with diverse power sources including lithium batteries
2. Compatible with 2-4Ω impedance speakers, covering mainstream low-power audio needs
3. Real-time charging/Bluetooth status indicator for clear operational visibility
4. One-touch power on/off via long press, no complex button settings for simple operation
5. Specifically designed for car navigation systems and mini audio devices, delivering stable mono audio output
Product Specifications:
Power Supply: DC 3.7V-5V
2.0/2P Speaker Jack: Compatible with 2-4Ω, 3-5W small speakers
2.0/2P Battery Connector: 3.7V-5V batteries
Button: Long press to power on/off
Charging Indicator: Red light on during charging, off when fully charged
Bluetooth Indicator: Steady red light when connected
Bluetooth Name: PY-591
This product is primarily designed to add Bluetooth functionality to devices in confined spaces, such as retrofitting Bluetooth into car navigation systems. It outputs 5W mono power, capable of directly driving small speakers rated at 3W-5W.
Important Notes:
1. This product must be powered by a 3.7V-5V battery (input voltage range: 3.7V-5V). The Type-C port is for charging only and cannot directly power the board.
2. This product's output cannot serve as a preamp stage. The negative terminal of the speaker wire must not be shorted to the power supply's negative terminal. Shorting will burn out the amplifier chip on the Bluetooth board.
3. The product operates on DC 3.7V-5V power. Exceeding 5V will burn out the Bluetooth chip.
4. The power interface and speaker interface must not be reversed. Reversing them will also burn out the chip.
Product List:
Amplifier Board*5
