Outdoor portable placement: Can adapt to any outdoor environment, strong magnetic pull, making the sound as stable as Mount Tai True Wireless Interconnected Surround Stereo: Two audio systems are connected in series, providing a double surround effect and double the shock. Phone holder function: Switch usage scenarios at , as you please. N39 strong magnet: Using iron strong magnets, the magnetic force can reach up to 5000 Gauss and can be strongly adsorbed on metal surfaces. Thus achieving enhanced sound and adapting to different scenarios. Shocking and sound quality performance: The use of a Bluetooth 5.0 chip ensures stable sound quality transmission and clearer performance of the sound. The circular cavity is paired with a 1.57-inch full frequency speaker, allowing for a complete and balanced presentation of sound across all frequency bands. Quick connection, sound transmission: Supports connection, with connection between phone and audio system Rated power: 5W Horn: 4 5W 40MM x 1+ diaphragm x one Frequency response: 60Hz-15KHz Separation degree: 90dB Signal to noise ratio: 75dB Battery: 3.7V/1200MHA dual protection board Working voltage: DC5V 1A Charging interface: Type-c Features: NFC sensing continuous, interconnection, hands-free call, Bluetooth playback Bluetooth version: 5.0 (6925A) Playback time: 2.5-8H "Volume dependent" Bluetooth receiving distance: 10M Charging duration: 2H Colour:Black Material:plastic Package Contents: 1 x Bluetooth Speaker 1 x USB Cable 1 x Instructions in Chinese and English Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.