JMKMGL 4-in-1 LED Flashlight, Stereo Bluetooth Bicycle Speaker with 2600mah Power Bank Function,Bike Holder include,Multifunctional Nightlight for Home Cycling Sport MULTIFUNCTIONAL: LED flashlight ,Bluetooth speakers,Bluetooth hands-free calling, Power bank function and Built-in TF Card slot LED FLASHLIGHT: 120 Lumen. Short press torch and power supply button,it enables you to stay away from darkness in to consideration, BLUETOOTH WIRELESS CONNECTIVITY: 4 in 1 multifunction bluetooth speaker only paired one bluetooth device at a time,compatible with mobile phone,pad,notebook and anyotherbluetooth devices, Handlebar Clamp Diameter: only fit for 25mm30mm bike bar. POWER BANK FUNCTION: It is equipped with a 2600mAh mobile power bank that charges your USB devices such as cellphone and tablet when you need it, JMKMGL Hassle-free guaranteed: Anything defect or problems, please email us first , and we will be in touch within 12 hours. Replacement or refund payment will be provided for you, the defect goods no need refund to us. Bluetooth /FM /Aux /USB/TF/SOS/lighting/battery charging function Input power:Mini USB 5V/lithium battery(500mA/3.7V) Frequency Response:100Hz~18KHz Working Distance:5-15 meters Distortion :  0.5% Flashlight Lamp luminance: 110 ~ 120LM Firstly: Charge it for at least 6 hours before your first use. When it don&#039;t work, please press the flashlight button to discharge the power. Then recharge the flashlight for 6 hours, it will be ok.<span class="a-text-bold"></span> Powered by 1 Output LEDs with <span class="a-text-bold">120 Lumens</span>, Flashlight gives off strong light to brighten your world, you can use the bluetooth speaker at the same time. The 2600mAh built-in rechargeable battery supports long time play and charges your mobile devices. Easy to pair with any bluetooth device. Speaker has stereo sound quality for playing music or answering phone call,You can even charge your mobile accessory or use the LED flashlight at the same time. When you received the flashlight,if can&#039;t open the device or fail to connect bluetooth, that&#039;s battery out of power. Please charge it over 5 hours. Or charge it first when you received it. Firstly Fix The Holder To The Handle Bar Of Your Bike Secondly Click The Flashlight Into The Mount Lastly Adjust The Angle For A Better View.