Rock Mulite Bluetooth LED Light Waterproof IPX4 Super Bass Music Subwoofer Speaker Support TF Card<br>Features:<br>Bluetooth audio playerHands-free functionWater resistance level: IPX4TF card audio player (max. 16G)TF card is compatible music format: MP3， WMA， WAVFrequency response: 20Hz-20kHz&amp;plusmn;3dBAudio Max power: 5W X 1Max. power consumption: 1WPower supplied: built-in rechargeable lithium batteryConnect external USB DC 5V power source to charge the unitCharging time:  Approx. 3-4 hoursContinue playing music about 6-8 hours when built-in lithium battery is fully charged.Continue for Nightlight about 10 hours when built-in lithium battery is fully charged.LED Bluetooth\/line\/TF card in indicator and power charge indicator<br>Specification: <br>          Brand       ROCK           Main functions       Bluetooth audio player， Hands-free function， &amp;Phi;3.5mm audio input interface， TF card audio player (max. 16G)           Frequency response       20Hz-20kHz&amp;plusmn;3dB           Audio max. power       5W*1           Max. power consumption       1W           Battery       built-in rechargeable lithium battery    (Connect external DC 5V power source to charge the unit， charging time: approx. 3-4 hours)           Water resistance level       IPX4           Product weight       640g           Product dimension       190 x 107 x 95mm           Color       Grey， Coffee   <br>Package Included: <br>1 x Rock Bluetooth LED Waterproof Speaker1 x USB Cable1 x Manual