20oz Sublimation Mugs Simple Detachable Bluetooth Speaker Mugs Portable Insulated Music Mugs with Gray Bottom 1. Speaker Bottle Material: Our insulated music mug is made of stainless steel, which is durable, strong and wear-resistant and will not rust.2. Music Mugs: Each stainless steel speaker has a detachable wireless speaker at the bottom, and the LED light will flash with the rhythm of the music, you can enjoy the music and relax while drinking water.3. Vacuum thermal mug: The music mug adopts double wall vacuum design, which has good thermal insulation effect. Keep hot drinks warm for up to 6 hours and cold drinks for up to 12 hours with this insulated travel coffee mug.4. Conical Design: With special conical design, it can be installed in the car cup holder and is convenient and portable to use when going out.5. Cleaning method: When cleaning the cup, unscrew the speaker to separate it from the cup, the speaker cannot be washed with water and will be damaged. Do not microwave. Specification: Item Type: Sublimation Mugs Material: Inner 304 Stainless Steel, Outer 201 Stainless Steel, PP Gross Weight: 495g / 17.5oz Product Size: Approx. 7.5 x 23cm / 3.0 x 9.1in Capacity: 20 ouces/600ml Input Port Power: Micro USB Output Power : 3W Battery type: lithium battery Battery model: 18650 Battery capacity: 600mah Charging time: 120 minutes Working time: 120 minutes Waterproof class: IP5 Effective Bluetooth range: within 15 meters Package list: 1 x USB cable 1 x English manual 1 x Bluetooth speaker 1 x cup