MCU serial port control One-to-one button control USB sound copy Built-in 3W amplifier Built-in 32Mbit (4MByte) memory It widely used: game basketball machine sound effect voice broadcasting, treadmill voice navigation, massage chair voice operation guidelines, equipment fault prompts, equipment operation guidance voice, vehicle safety voice warning, public place voice prompts, business hall warm voice prompts, etc. Hardware Parameter: MP3 file format: Support all bit rates 11172-3 and ISO13813-3 layer3 audio decoding Supports sample rate (KHz):8/11.025/12/16/22.05/24/32/44.1/48 Support these sound effects: Normal,Jazz,Classic,Pop,Rock USB port: 2.0(standard) UART port: Standard serial port, TTL level Input voltage: DC3.3-5.2V; IO level 3.3V Rated current: Standby current: 500uA; working current: 10MA Work temperature: -40℃-85℃ Humidity: 5%-95% Colour:black Material:PCB The actual product may have slight color difference or difference, which will not affect the use Package Contents: 1 * Voice broadcast module