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Denon HEOS 1 Go Pack - Rechargeable Battery Extend your HEOS 1 speaker's portability with the Denon HEOS 1 Go Pack rechargeable battery. This lithium-ion battery pack easily attaches to the HEOS 1 base, delivering up to 6 hours of wireless playback without AC power. Key Features Portable lithium-ion rechargeable battery with battery strength indicator LEDs Up to 6 hours of playback on a single charge via Bluetooth, Wi-Fi, or AUX input Easy twist-on/twist-off attachment to the HEOS 1 base Charge your smartphone while listening via the USB 5V/1A output Includes silicone splashguard for protection against splashes, ideal for outdoor use Bluetooth functionality enables wireless listening without Wi-Fi or cables Specifications Playback Time: Up to 6 hours of music listening on a single charge Charge & Play: Connect your smartphone to the USB port to charge your device while playing music (note: maximum playback time will be reduced accordingly) Controls and Indicators: On/Off button; 4-point LED battery strength indicator Weight: 0.32 kg (0.71 lbs) Dimensions (H x W x D): 1.3 x 4.92 x 4.65 inches Operating Temperature Range: 41°F - 95°F Product Finish: Black or White What's in the Box HEOS 1 Go Pack rechargeable lithium-ion battery Silicone splashguard Quick Start guide