Zealot S1 Multi-in-1 Function Bicycle Speaker*Bluetooth Music Player*Power Bank with 4000mAh output*Bluetooth Hands Free Phone Call*Micro SD/TF Card MP3 Player*FM Radio*Emergency Torch/FlashlightSports/Cycling Big Love Designed to mount on bike's handle-bar, it gives you a rocking stereo cycling journey in day and night. By simply pressing the power button, torch light (3 light modes) enlightens your way and can be perfectly used in outdoor hiking and emergency moments. Great Protection Silicone protective sleeve ensure waterproof, dustproof and shockproof. Up to 24 hours Music Play Built-in 4000mAH battery (Power bank as well), S1 can last for up to 6-12 hours on a single charge for Bluetooth function. Playing by micro SD card? It can play all day and night! Specification Bluetooth Version: CSR 4.0 Battery capacity: 4000mAh Music/ Calling time: about 10hrs (Micro SD card up to 24 hours) Standby time: 30 days Charging time: about 5 hours Transmission distance: 10m Frequency response: 20Hz-20KHz Speaker: 4 Output power: 3W LED lamp power: 1W (3 LED modes: Normal, Weak, Flash) Colour: Gray Size: 156 x 51 x 51 mm Weight: 260g