Tecboss KM20 is the upgraded version from T10 or KM18: Sleep / power off function to prevent draining your battery; Shuffle while playing USB Flash Drive or TF Card; seven large keys for easier operation.
Bluetooth hands-free car kit - Safely and conveniently answer/ hang off/reject/redial calls through hands-free function.
Four playing sources - Stream music from Bluetooth devices, it can also play songs in TF Card, USB flash drive, or connect with 3.5 mm audio cable. For TF or USB drive play, it supports Normal/Shuffle/Repeat, and it only supports MP3/WMA format songs.
USB fast charging - Device could display current voltage level of your car; two USB ports, one for charging, the other for reading USB files.
Pretty decent sound - Advanced noise or static cancellation technology for an optimized audio quality. Backed with 6 month free replacement warranty.