PC Speaker - Universal - Wireless Speaker Portable Bluetooth Outdoor Speakers Waterproof Subwoofer High Power Subwoofer Stereo Speakers | Portable Speakers (Black) Highlights Universal Wireless Speaker Portable Bluetooth Outdoor Speakers Waterproof Subwoofer High Power Subwoofer Stereo Speakers | Portable Speakers (Black) Portable Wireless Speaker Bluetooth Outdoor Speakers Waterproof Subwoofer High Power Subwoofer Stereo Speakers | Portable Speakers (Black) Features: Bluetooth Version: V5.0 Outer Material: Metal Waterproof Level: Waterproof IP5 Loudspeaker: 4, 5W*2 Transmission Range: 10m Battery Capacity: 4000mAh Call Duration : about 6h Charging time: 4 hours Music playing time: 20 hours Product size: 17.9cm x 8cm x 8cm Transmission distance: 10m Frequency response: 80Hz-20kHz Output power: 10W Signal to noise rating: 85DB Working voltage: 3.7V Distortion: 1% Standby time: 30 days Weight: 532g the color black Compatible with: iPhones, Android phones like Samsung, Zte and so on, PC TWS: turn on both speakers at the same time, then long press "M" key