Wireless Speaker Featuring High Definition Bluetooth® 3.0 Technology | Simply Pair With Your Device To Enjoy Dynamic Stereo Sound | Melody Alarm With Adjustable Volume And Snooze Function | Use Micro SD Slot For A Preset Playlist | Perfect For Your Home Or Office Activities | Pairs From Up To 30 Feet Away | Output: Dual 5 Volts/1 Amp & 2.1 Amp | Large Dimmable LCD Display With Brightness Adjustment Settings | Built-In Thermometer (Celsius/Fahrenheit) | Pairs From Up To 30 Feet Away | Features Dual USB Output And A/C Input (Power Adapter Included) | Features 3 x AAA Back-Up Power (Batteries Not Included) | The Bluetooth® word mark and logos are registered trademarks owned by the Bluetooth SIG, Inc. and any use of such marks by Hit Promotional Products, Inc. is under license. Other trademarks and trade names are those of their respective owners.. Approximate Size: 4″ W x 3 1/2″ H x 2 1/2″ D, Imprint Area: 1 1/4″ W x 1 1/4″ H