?Weight: 141gDimensions: 8.07 in x 4.88 in x 4.33 in (20.5cm x 12.4cm x 11cm)Brand：BIKEMANModel：YKWB-B1031Quantity：1Color：Blue + Army GreenMaterial: Nylon + OxfordShell Material: PC + ABSCommunication Mode：Wireless Frequency 2.4GHZControl Distance: 3mBackpack/Pendant: Waterproof FabricWorking Time: 20   -30HCharging Time：3H（With LED Indicator Light）Remote Controller Battery: 2 x CR2032(Built-in)Remote Controller Waterproof Level：IPX-5Receiver Waterproof Level：IPX-2Receiver Battery: 4.2V， 650mAh lithium battery(Can charge on DC5V500mA adapter)Best Use: Cycling ， Mountain Cycling ， Recreational Cycling ， Road Cycling ， Triathlon ， Bike commuting & touringFeatures:LED remote control warning backpack is like traffic lights; When you want to turn left or right or stop， a corresponding singnal will be sent by remote controlWhenever you ride in the day and at night， warning lights will keep you safer by reminding people around youEasier operation and safeFashionable style and unique appearance get you outstandingNotice: Can not be sold in Britain， Germany and Canada， because they have agented for this brandPacking List:1 x Tail Bag1 x Remote Controller1 x Remote Controller Deck1 x USB Cable (50 cm)1 x Chinese Manual4 x Handlebar Binding Wire<img src="//112.74.112.28/down/products/433984/433984_000.jpg">