Note: If you have any after-sales questions, please contact us promptly, we are happy to serve you 24 hours a day. DIMENSION OF STEREO AND SPEAKERS:Stereo unit,Cutout Diameter: 3.15"/80MM Mounting Depth:3.5"/90MM Speakers unit,Product Dimensions 4.4"(W) x 4.4" (H) x4" (D). TRAVEL WITH LUXURY! – With this excellent quality Marine dashboard stereo entertainment system with 2.75" LCD digital display that lets you listen to music compatible with bluetooth even, Waterproof Construction you don't have to worry about the elements!. AUDIO SPEAKERS UNIT: 2-Way 4" Marine Grade HIFI Full Range Stereo Pod Speakers with 1" PEI Dome Tweeter, Maximum handling 100 watts(A Pair) , Frequency response 80 - 20,000Hz , Impedance 4 ohms,Perfect for Marine, Boat, UTV, ATV, Truck, Golf Cart, Powersport, Motorcycle, Motorbike, RV, Automobile & Off-Road Vehicles. MULTIPLE CONNECTION: This stereo receiver system is equipped with AUX and RCA input / output connector jacks for additional audio devices and speakers. It also has an AM / FM radio function with selectable band and a USB reader. PACKAGE KIT INCLUDES: 1 Herdio Marine Boat Yacht Outdoor USB AUX AM/FM Radio Receiver + 1 Pairs (Total of 2) Herdio 100W 4’’ 2-Way Mount Marine Speakers(Black).Format: WMA. Audio Output Type: Speakers. Control Method: Touch. Output Wattage: 100 Watts. Number of Channels: 4. Wattage: 100 watts. Color: Black. Compatible Devices: Speaker. Connectivity Technology: RCA, Bluetooth, Auxiliary, USB. Brand: Herdio. Manufacturer: Herdio. Date First Available: September 10, 2020. Is Discontinued By Manufacturer: No. Best Sellers Rank: #154,057 in Electronics. Customer Reviews: 4.1 out of 5 stars 136 ratings 4.1 out of 5 stars. Item model number: MXR-804-5104B-47W-77. : B0713T7QDF. Item Weight: 4.82 pounds. Package Dimensions: 17.95 x 6.69 x 6.06 inches.