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 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,,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 not affect the use Package Contents: 1 * Voice broadcast module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.