If you want to switch the function, please disconnect the USB with PC, then operate according to the steps above. What is more, the current must be 2.1A above when charging P1000, so you should match up with the P1000 original adapter ( or other adapter whose current can be 2.1A above ), otherwise it must be charged with off status ( including USB port in PC )                 <strong>Type:</strong> Cable                               <strong>Color :</strong> Black <br />             <strong>Interface type:</strong> USB 2.0, 30 Pin <br />             <strong>Cable length (cm)  :</strong> 1m                                            <strong>Package weight:</strong> 0.045 kg <br />             <strong>Package size (L x W x H):</strong> 11 x 4.0 x 2.5 cm / 4.32 x 1.57 x 0.98 inches                               <strong>Package Contents:</strong> 1 x 1M USB to 30 Pin Charging Data Transfer Cable Cord for Samsung Galaxy Tablet                 <img src="http://des.chinabrands.com/uploads/2015/201511/heditor/201511251021034186.jpg" alt="1M USB Data Sync Cable Power Charger for Samsung Galaxy Tablet" />