UNIQUE 4-in-1 DESIGN: Car mount holder with dock station features a 360? degree rotating gooseneck clamp for multiple viewing angles and best orientation. This car cellphone holder features USB charging port, car phone mount holder, built-in microphone and FM transmitter for audio and music streaming through your existing car stereo system. UNIVERSAL COMPATIBILITY: Works with all Apple iPhones: 7 Plus/7, 6S Plus/6S, 6 Plus/6, SE, 5C, 5S, 5; Samsung Galaxy S8+, S8, S7 Edge, S7, S6 Edge+, S6 Edge, S6, S5, S4, S3, Note 5, Note 4, Note 3, Note 2 and other Android smartphones. AUDIO TRANSMISSION: An excellent car mount that easily connects to your existing car cigarette power outlet. The FM transmitter uses an LED display to show and indicate radio frequency/station (88.1MHz - 107.9MHz). You can transmit audio through your existing car stereo system by tuning into the same frequency station displayed on the LED. CONVENIENCE IN MIND: Built-in overcurrent protection guards your device battery against any overcharge damage. Built-in USB charger allows you to charge you smartphone or any other mobile electronic device that uses a USB port. The built-in microphone allows for handsfree calling for safe and convenient driving. 100% CUSTOMER SATISFACTION: Multi-purpose car phone holder & cell phone docking station is recommended for vehicles with a vertical or 45? degree angle power outlet. We don't recommend it for vehicles with power outlets that are positioned horizontally. 2-YEAR exclusive warranty ensures you are protected for 2 years of this product and 30-DAY MONEY-BACK GUARANTEE offers peace of mind, enabling you to return the product in case you don't like your purchase for any reason.