The best Alexa speakers of 2021: The top smart 40w speakers to control your home | TechRadar. e-PitchPerfect Smart Speakers to control your home, and communication, and Audio Amplifier / Speakers / Speakers / pbones, All in One. Bluetooth version: ATS5.0 Power supplier: DC5V Output power: 40W Lithium battery : 5200mAh Audio driver 45mm*2+ 70mm Subwoofer Case Material: TPU+metal Dimensions: 22.6x6x10cm Weight: 1100g Play time: 5hours Charging time: 3-4 hours