The Whammo Bluetooth Speaker is a portable speaker that includes 3 "AAA" batteries. The compact size makes the Whammo Bluetooth(R) speaker the perfect portable speaker. Up to 3hrs of playback time at max volume. 2 Watt Speaker Output.Bluetooth working range is 10 meters (33 feet). Complies with Prop 65. 1.75" H x 2.75" W x 2.75" L. Imprint Area is 1.00" H x 1.50" L on Default imprint area centered on front body. Please call for rush delivery availability or for multi-colour, multi-location imprints.