<b>Specifications:</b> <br>Model: 3311 <br>Material: Plastic + Electronic Components + Metal <br>Color: Blue/Yellow <br>Submarine Battery: Built-in Lithium Battery <br>Remote Controller Battery: 4 x AAA (Not included) <br>Function: Forward, Back, Turn Left/Right, Diving, Floating Up <br>Charging Time: 30 Minutes <br>Working Time: 15 - 20 Minutes <br>Submarine size: 15 x 6.8 x 4.5 cm / 5.9 x 2.7 x 1.8 inch <br>Package size: 26.5 x 10.5 x 8.5 cm / 10.2 x 8.1 x 3.5 inch<br>Weight: 280 g / 0.62 lb <br><br><b>Charging Instructions</b><br> The charging time is about 30 minutes. Please unplug the charging cable in time, after charging is complete.<br>The input voltage is 5V. Please use a reliable USB adapter to charge the submarine. <br> During charging, please keep away from open flames and high temperatures, and prevent water from splashing on the charging port.<br> <br> <b>Package Included:</b> Note: Indoor use only. It is not suitable for playing in swimming pool. Please don't put the remote controller into water.