Mini Portable Wireless Bluetooth Speaker Metal Stereo Loudspeaker with Mic Subwoofer MP3 Music Player for Phone|Portable SpeakersblackMini portable wireless bluetooth speaker metal stereo speaker with microphone subwoofer MP3 music player for phonemainFeature:1. Support BT music, BT hands-free call, LINE-IN, remote shutter.2. Built-in stereo speakers.3. Feature TWS (True Wireless Stereo): TWS allows audio to be wirelessly forwarded between two speakers, and audio is played simultaneously on the two speakers.4. One-to-two: Two speakers are paired with one mobile device at the same time. The distance between the two speakers is no more than 5M, and both speakers support BT music, BT hands-free calling, and remote shutter.5. Smooth metal surface, rubber feet at the bottom, can be placed firmly. The lanyard is easy to carry around. specification:1. Bluetooth version: V4.22. Size: 33.5mm49mm3. Net weight: 70 grams4. Speaker output: 3W5. Frequency response: 20HZ-20KHZ6. Battery capacity: 400mAh7. Battery charging voltage: 5V [USB]8. Bluetooth distance: 10m9. Distance between two speakers:0-5m10. Signal-to-noise ratio: 80dB11.