Features: brand new and high quality Attention Needed: There are quite a few differences between the two models, please kindly check the relevant descriptions or specifications for choosing the right one. Equipped with Double Acoustic Units and Double Sound Units for Immersive Sound Effect: The Sound bar for TV is equipped with Bass chip and HIFi chips so as to ensure immersive stereo sound efffect. Long Standby Duration: It owns a built-in 2000 mAh battery so as to ensure effortless applicatiom, frees you from frequent recharging. Multiple Certifications Obtained: CE/ROHS/FCC. Multiple Input Modes Optional: Supports RCA/Standard 3.5 mm Audio/OPT/SD Card/TF Card, Bluetooth-compatibletooth-compatible. Specifications: Item Type: Bluetooth-compatible Speaker Material: Metal, Plastic Audio Format: MP3/WMA/WAV Color: Black Weight: Approx. 775g Compatible-Bluetooth-compatible Version: 5.0 Transmission Distance:8-10m/26.2-32.81ft(No Barrier) Continuous Listening Time: Approx. 8hrs Charging for Time of 1A: Approx. 3hrs Standby Time: 240hrs Battery Type: 18650 Battery Capacity: 2000MAh Charging Voltage: for DC 5V/1A-2A Charging Jack: Micro 5pin（V8） Speaker Power: 5W×4 Input Source Type/Funtion: Memory Card/USB Flash Drive/3.5MM/FM/Bluetooth-compatible Differences Between Model BS-41A and BS-41: BS-41A (Standard Model): Size: 380x78.5x58 mm Sound Unit: 5Wx2 Input Source Type: 3.5 mm Audio Input Remote Control: Not Available BS-41 (Flagship Model): Size: 540x78.5x58 mm Sound Unit: 10Wx2 Input Source Type: 3.5 mm Audio Input/RCA/Optic Fiber Remote Control: Available Package Includes: 1 x Speaker 1 x USB Cable 1 x 3.5mm Audio Cable 1 x Manual 1 x RCA Cable note: 1. Please allow slight inaccuracy due to manual measurement, make sure that you do not mind before you order. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. There are quite a few differences between the two models, please kindly check the relevant descriptions or specifications for choosing the right one.