No built in flash memory volume. But can extend Support : SD MMC TF Memory card 1GB- 8 GB ;USB flash 1GB-8GB Read MP3 audio file With built-in stereo wireless transmitter, 206 frequency rang from 87. 5MHz-108. 0MHz, The playing song, volume and frequency can be stored when cutting off power. Song name and frequency can be displayed by LCD screen. With infrared remote control. Transmit distance : 10 meter 12/24 volt wireless transmission. Colors : Red, Blue, black, silver and yellow.
