Features: [Advanced BT Technology] With advanced BT 4.0 technology, up to 10m BT effective range, a 2-inch 10-watt 16-core full-range high-fidelity speaker, supporting BT TWS (True Wireless Stereo) function, it can streams incredible stereo sound with full range output. [Speaker w/MIC and Hands-free] You can conveniently answer a call by this portable BT speaker when driving, in bathroom, at home or office, anywhere and anytime during it is connected to your Smartphone. [Wireless Charger for Mobile Phones] A1 can be used as a Wireless Charging Seat for mobile phones which support wireless charging, such as for iPhone X/ 8/ 8 Plus, for Samsung Note8/ S8/ S8 Plus and more. [Mobile Phone Holder] The top of the speaker imported from Germany non-slip nano, so you can stand your mobile phone on the top of this speaker and watch videos as well as enjoy the excellent sound of the speaker. [Long Working Time] Built-in rechargeable 1800mA Li-Ion battery supports about 6-8 hours of playing time, so you can enjoy music or use it to wirelessly charge for your phones without worries about running out of the power. Specification: Model: A1 BT: BT 4.0 and above, supports TWS BT output power: 5W RMS Speaker parameters: 2 , 4O, 10W Signal to noise ratio: ? 85dB Bass diaphragm: 2PCS Battery: 1800mAh 4.2V Rechargeable Lithium battery (18650) Battery