Promotional Product Features: 30.5 ( l ) x 5 ( w ) x 16 ( h ) ABS & polycanvas Bluetooth V 4.1 10m visible distance supports playback from smartphones, tablets or most other Bluetooth compatible audio devices< TF card function internal, rechargeable lithium ion polymer battery recharges via USB cable ( included ) built-in microphone supports call pick-up Branding Options Debossing (BOS)