Wireless Portable V3.0 Bluetooth Speakers Portable - (High Definition Audio, Built-in Microphone, Wireless Bluetooth Play,Handsfree Call, 2x3.5W Acoustic Drivers, 12 Hours Playtime) Wireless water-proof Portable Bluetooth Speaker for Music Streaming via Bluetooth V4.0 Technology, compatible with most Bluetooth-enabled devices Bluetooth speaker 4.0 and CSR chipset connects faster, more stable, compatible with all your Bluetooth-equipped devices, and Outstanding connection range of up to 10 meters Built-in microphone: Enables use this Wireless Bluetooth Speaker as a speakerphone, so you can enjoy hands-free calling Built-in rechargeable 3.7V, 3600 mAh lithium-ion polymer battery: Provides extended playback, enables you to stream music for up to 12 hours on a full charge Water-proof and sand-proof design: Safeguards the subwoofer sound speakers against water submersion, plus dust and other small particles, so you can listen to music both indoors and outdoors