Bluetooth Bicycle Speaker w/ Microphone and Mount. For LG Optimus F3Q, LG G Flex, LG G2, LG Nexus 5, LG Optimus F6, LG Optimus F3, LG Optimus F7 &More Digital Devices Play Music & Make Calls Via Bluetooth Splash Proof, Durable Bluetooth Speaker | Tightly Attaches to Bicycle Frame Adjustable Volume | Play/Pause Buttons | Comes with a Built-In Rechargeable Lithium Ion Battery; via Micro-USB Cable (Included) 3 Hours of Working Time | About 25-30 Hours of Standby Time Frequency Range: 80Hz ~ 20KHz | Sound Output 2.0 Amplifier Output