Features: 9-way one-on-one segmented triggering control player, can triggered up to 9 tracks. Supports MP3 and WAV decoding format, and supports Sound file sampling rates up to 48KHz. You can connect to the computer via a USB data cable to replace Sound files. Equipped with a 20W Class D amplifier, it can directly drive 4-8Ω, 5W-20W speakers. Can be externally connected to a 12V warning light, with a power supply voltage of 12V. The switching is set with 8 triggering working modes. Specifications: Material: PCB Size: about 50x50mm/1.97x1.97inch (more detail size please refer to picture) Model: T20L Power: DC6-35V Direct drive: 4-8Ω speaker Maximum output power: 20W Supports card (memory cards) up to 32GB, USB drive (up to 32GB), card and USB drive must be in FAT32 format Decoding format: Supports MP3 and WAV Package Includes: 1x Voice Playback Control Module note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.