Features: 

• Diameter: 67mm or 2 3/4 inches. Height: 180mm or 7 1/8 inches. Weight: 548g or 1.2lbs
• IPX7 rated: UE BOOM 2 can be immersed in water up to 1m for up to 30 minutes.
• Maximum Sound Level: 90dBA Frequency Range: 90Hz - 20kHz Drivers: two 45mm (1 3/4") active drivers and two 45mm x 80mm (1 3/4" x 3") passive radiators.
• Rechargeable Lithium-Ion Battery for up to 15 hours of battery life between Micro USB charges. Actual battery life will vary with use, settings and environmental conditions. Charge time: 2.5 hours
• Pair up to 8 Bluetooth enabled devices - Connect up to two source devices at the same time. Wirelessly play (stream) to 2 UE BOOM 2s from one source. The mobile range of play is up to 33m (100 ft). NFC (passive) enabled - (works with active NFC enabled source devices * Android Jellybean and higher).

• For Audio Playback - Smartphones, tablets and other devices that support Bluetooth wireless audio profile [Advanced Audio Distribution Profile (A2DP)] or 3.5 mm audio output. Phone Calls: Phones that support Bluetooth Hands-Free Profile (HFP1.5)

Included: 

• UE Boom 2 Speaker
• D Ring
• Rubber Port Cover 
• Generic Charger Cable