Sonlipo Wireless Speaker Bluetooth V3.0 Stereo Music Outdoor Sport Waterproof Mini Speakers Built-in Microphone for Camping Climbing Bicycling Hiking (Blue) Play Music & Make Calls via bluetooth V3.0+EDR built- in noise cancelling microphone Ideal for Professional Sport Person,Waterproof,Dustproof,Shockproof,Rechargeable, Suitable for outdoor exercise like Camping,Climbing,Bicycling,Hiking, Speaker Phone feature enables hands free phone calls Ideal for Children, Infants, Suitable Baby Carriages ,Scooters, Bluetooth Speakers offer perfect piano music sound quality and effect, Outstanding sound quality, Bluetooth control, Adjust volume inclinations Compatible with Samsung, iPhone, iPad, HTC, LG, Tablet, Laptop, PC, Mac. Up to 4 hours working time and maximum 25-30 hours standby time Durable portable speakers match rotatable bluetooth bicycle speaker holder, Speaker swivels 360 and pivots up and down, Can freely adjust and fixed tightly