Rocktech

Bluetooth Rocktech speaker 4.0 and CSR chip set connects faster, more stable, compatible with all your Bluetooth-equipped devices, and Outstanding connection range of up to 10 meters. 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.

Wireless Water-resistant Portable Bluetooth Speaker for Music Streaming via Bluetooth V4.0 Technology, compatible with most Bluetooth-enabled devices.

Water-resistant and sand-proof design: Safeguards the sub-woofer sound speakers against water submersion, plus dust and other small particles, so you can listen to music both indoors and outdoors.