Looking for the perfect holiday giveaway? Get your very own 16 Oz. Portable Tumbler and Wireless Speaker. It features a stainless steel double-wall vacuum insulated tumbler that can keep the temperature of your drink longer. The tumbler can be used for both hot or cold liquids. The lid is a speaker that is powered by a rechargeable battery with an input of DC 5V; Output: 3.3V-4.2V; Capacity: 450 mAh; Sensitivity: -80dB;Frequency response: 150Hz-15KHz; Transmission range: 8m (26 ft); Bluetooth 4.2. This device can play your music non-stop up to 1.5 hours at top volume.Customize this item with an imprint of your company name and logo before handing out to your valued clients. Tumbler is not dishwasher or microwave safe. Certified CE and FCC.Call and place your orders now!