Wireless Bluetooth Speaker,Naturalrays Ultra-Portable Outdoor Waterproof Boombox Speaker for iPhone, iPad Mini, iPad 4/3/2, iTouch, Nexus, Samsung,other Smart Phones and Mp3 Players Green 1. Easy to Carry: With a long rubber rope, the speaker can be easily tight to bicycle faucetbackpack or anything have a hole. 2. 3 Play Mode: Bluetooth/TF Card/AUX 3 mdel available, just Double press the power button to complete the switch 3. Lightweight but Long Play Time: It can play 8 hours at biggst volume and only 2.3 ounces weight. 4.Waterwroof and Dustproof: IPX5 Waterproof ensures this bluetooth speaker can be used in rainy weather,and even take it to shower. 5.Fast Charging: 2-3 hours it can be full of charge.