Color:B-Pure Black Why Choose VtinAll VicTsing Products are Produced under Strict Quality Inspection12-Month Worry-Free Warranty and Free Life-time Technical SupportProfessional After-Sales Team99% Positive Amazon FeedbackVTIN Premium Stereo Punker Series Bluetooth SpeakersNOTE: IPX4 is for SplashProof you can use it for poolside, beach, a shower or a rainy camp day but CAN NOT MAKE IT IMMERSION IN WATER.When turn on the speaker you can hold down the plus sign on the speaker itself until it starts making a sound like a busy signal

Once you hear that the speaker VOLUME IS AT MAX.When there is consistent beep sound, it means the speaker is at low battery, and you need you to recharge it

It would be better not to use it for listening while charging.High Performance-Price Ratio 20W Bluetooth Speaker You Can FindHigh Powered by dual 10 watt subwoofer drivers Vtin waterproof bluetooth speakers offers very crisp and clear sound which is loud enough for your bedrooms kitchen office place backyard or outdoor activities like biking drving camping trip and so on25 Hours Playing TimeWith built-in 4400mah battery this 20 watt bluetooth speaker can play music up to 25 hrs at the volume of 70% also a perfect gift for those who like to enjoy the music from morning to the evening.IPX4 WaterproofIt is IPX4 waterproof and come with a D ring which is handy to attach the speaker to a backpack or even a lawn chair so you can use it at the poolside on the beach even a camp rainy day.Specification:Input Voltage: DC-5V/1.5APairing Range: up to 10 meters under barrier-free conditionPlaying Time: about 30 hours at 70% volume (depends on different music)Charging Time: about 8 hoursPackage Included:1 x VTIN Punker Portable Bluetooth Speaker1 x AUX Audio Cable1 x Hook1 x USB Charging Cable1 x User Manual