Mini Bone Conduction Speaker Vibration Stereo Audio Digital TWS Wireless Bluetooth Speakers Portable Metal Speaker

Voltage range : Low voltage non-USB (below 75V DC, below 50V AC) High-concerned chemical : None Input/Output : USB Sound Mode : Stereo Sound Mode Category : Speakers Use : Home Input Power(W) : 25-49 W Voice Control : No Waterproof : No Support APP : Yes Material : Aluminum Inbox adaptor : No Intelligent Personal Assistant : NONE Audio Crossover : Full-Range Number of Loudspeaker Enclosure : 1 Power Source : Ac,Battery,USB Channels : 5.0 Battery : Yes Communication : Bluetooth Speaker Type : Portable Cabinet Material : Plastic Power Source : USB Material : ABS+ Aluminium Alloy Size : 40*40*28 mm(L*W*H) Color : Black, Silver, Red Power : 5W Frequency : 20HZ-20KHZ SNR : ≥75db Distortion : ≤0.1% Battery : 3.7V/400MAH Speaker : 3W/4Ω/ 27mm Distance : 10M Support : Bluetooth + TWS Specification: Material: ABS+ Aluminium AlloyColor:  Black, Silver, Red Size: 40*40*28 mm(L*W*H)  Power: 5WFrequency: 20HZ-20KHZSNR: ≥75dbDistortion: ≤0.1%Charge Voltage: 5VBattery: 3.7V/400MAHSpeaker: 3W/4Ω/ 27mmDistance: 10MSupport: Bluetooth-Compatible + TWSPackage Included: 1PC * Mini Bone Conduction Speaker1PC * Type C Cable1PC *Use ManualNote:1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from real object. Label:Yes