Instructions:This Infrared Remote Control submarine is a great gift for kids.It is made of solid material and exquisite workmanship， which is safe and durable enough for your child to play.This remote control toy can help cultivate your kid's operating ability greatly.It can bring lots of suprise and fun to your kids and keep him/her happy all the time.Description:Color: blueProduct size: 9.5 x 7.5 x 5 cmBattery: 3.6V/150mAh battery (built-in)Remote Battery: 4 x 1.5V AA batteries (not included)Travel time: about 6-8 minutesCharging time : about 10-15 minutesCharging method: remote control chargeRemote control distance: about 3-5 metersProduct features: forward / dive / left / right / floatingNotification:1. Please do not place it under water if you don't play with it.2. As for the battery for the remote controller， please use ordinary battery instead alkaline battery.