MCU serial port controlOne-to-one button controlUSB sound copyBuilt-in 3W amplifierBuilt-in 32Mbit (4MByte) memoryIt 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 decodingSupports sample rate (KHz):8/11.025/12/16/22.05/24/32/44.1/48Support these sound effects: Normal,Jazz,Classic,,RockUSB port: 2.0(standard)UART port: Standard serial port, TTL levelInput voltage: DC3.3-5.2V; IO level 3.3VRated current: Standby current: 500uA; working current: 10MAWork temperature: -40℃-85℃Humidity: 5%-95%Colour:blackMaterial:PCBThe actual product may have slight color difference or difference, which not affect the usePackage Contents:1 * Voice broadcast moduleOnly 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.