The Royqueen Meenee Bluetooth Speakers is a small but powerful speaker that can provide extreme sound and quality. It is known for its size and portability while providing clear and crisp sound that can be easily heard. Hands Free Voice Call Dual-Coil Design for excellent sound quality Bluetooth Technology High quality material Support music from TF card Support micro SD up to 32Gb Support Line-in source Rechargeable battery up to 5 hours continuous playtime Bluetooth version: v2.1 Working Range: 10 meters Working Time: 2 - 5 hours Frequency response: 120Hz - 18KHz Loudspeaker output: 4Ω3W S/N: >95db% Size (L x W x H cm):10.8 x 3.6 x 5.4 cm Weight (kg): 0.26 Product warranty: 1 Year Warranty Package size: 14 x 7 x 7 cm package inclusions: Bluetooth Speaker USB Cord AUX Cord User Manual