Divoom On-Beat 500 Bluetooth Speaker for Smartphones - Retail Packaging - White Dimensions: 8.6 L x 3 W x 4.13 H Weight: 2.58 lb. Driver size: subwoofer; 3 satellite: 2x 2  Output power: 13W (subwoofer: 5W; satellite: 4W X 2 ) Frequency Response: 60-20000Hz Signal-to-Noise Ratio: 75 dB Playback Time: Up to 8 hours Battery Capacity: 3000 mAh Battery Voltage: 3.7 V Battery Charge Time: 4h hours Wireless Range: Up to 10 meters/33 feet Bluetooth Compliant: V4.0 Bluetooth Profile support: A2DP Stereo Talk Time: Up to 8 hours Microphone sensitivity: -36 db.