Features:

Appearance size: 77 * 39.5 * 77mm Maximum output power: 5w Signal to noise ratio:>90dB Frequency response: 100-18KHZ Speaker: 40mm Bluetooth version: V5.1 Effective distance: within 10 meters Battery charging time: 3 hours (5V/1.0A input) Battery type: Rechargeable lithium battery Music playback time: 4 hours Battery capacity: 400mah Packaging: 1 * Audio system Estimated delivery timeLsAbout 10 business days.We will use standard shipment for the orders. Normally it may need about 10 days, but sometimes please note: Delivery times are as provided by our carriers and are estimates only. Delays may occur during peak periods, and due to factors outside the carriers control.