... can direct drive 0.5W/8ohms speaker Sound module--WT588D program module, MTP sound module, voice module , re-programmable voice ... from 6Khz, 8KHz ....to 22Khz . Higher sampling rate better sound quality ,shorter durations .*Built-in 13Bit D/A convertor, 12Bit ... writer after programed voice.*Equipe with USB programmer for downlaod sound form PC via the our PC softwareApplicationsToys /alarm system/ ...