Envaya Bluetooth speaker with 13 hour battery life
Envaya - DSB-200
User manual Denon Envaya Mini DSB-100 (English - 35 pages)
Denon DSB-50BT Envaya Bluetooth 6.4” Pocket Speaker (Black) - Lightweight, Waterproof & Dustproof | Up to 10 Hours of Battery Life | Hands-free Phone Calling | Voice Compatibility with Siri
Best portable Bluetooth speaker 2017: Denon Envaya DSB-250 - YouTube