Product Features: Dynamic Spectrum Handsfree Call TWS Coupled AI Intelligent Voice Interactive Clock Display Alarm Clock Settings Bluetooth Play TF Extended Play Support Desktop and Laptop Sound Card Mode Play Sleep Aid Night Light Product model: M20 Material: ABS+PC+silicone Audio output power: 6W (RSM) Frequency response range: 50 HZ-20 KHZ Battery capacity: 1800mAh Bluetooth version: Jerry 5.1+EDR Bluetooth distance: straight line obstacle free 5-15M Voltage and current: DC 4.8-5V 800mHA Connection method: Bluetooth connection Signal to noise ratio: ≥ 60dB Effective distance: straight line obstacle free 5-15M Box material: plastic Appearance size: 120 * 170 * 100 Specification: 120 * 170 * 100mm Power supply method: lithium battery Waterproof grade: non waterproof Bluetooth version: 5.1 Internal battery capacity: 1200mAh to 2000mAh (included) Net weight of product: 305g