Dreamwave TREMOR Army Green/Black Aluminum Wireless 50W Rugged Outdoor Bluetooth Speaker Color: Black/Green Speaker Type: Bluetooth Speaker Wireless Technology: CSR 4.0 + EDR, A2DP AVRCP, APTX / NFC Function Speaker Configuration: 2 full range, 2 passive driver 2 tweeter HI FI digital amplifier Anti-Distortion circuitry Total Power: 50W Battery: Portable power bank 20800 mAh Playback Time (up to): 8 hours at max volume Dimensions: 17.3 x 7 x 6.7 inches