SDRD Wooden Box Karaoke Machine With Wireless Dual Mics All-In-One Speaker System Supports U DiskTF Card 1. Portable karaoke speaker set, equipped with a hand-carry wooden case, dual wireless microphones, supporting 5 playback modes including Bluetooth, USB flash drive, TF card, and audio cable. Suitable for indoor and outdoor karaoke, live streaming, and music listening, compatible with mainstream karaoke apps and devices. 2. Suitable for various scenarios such as family gatherings, camping, and outdoor performances. 3. Stable Bluetooth 5.0 connection (10 meters), compatible with mobile phones, tablets, TVs and other devices. 4. Dual U-band wireless microphones, anti-interference, anti-squeal, low noise. 5. Built-in 4000mAh lithium battery, providing 3-4 hours of continuous use. 6. 4-inch external magnet speaker, clear and full sound quality. Parameters: 1. Bluetooth solution: Jerry Bluetooth 5.0 2. Bluetooth range: 10 meters 3. Speaker power: RMS (4Ω 15W + (8Ω 15W x 2) THD = 10%) 4. Speaker specification: 4-inch external magnet 5. Battery specification: Built-in 18650 4000 mAh 7.4V 6. Playback time: 3-4 hours 7. Charging method: Charger (specification: 5V-2A) 8. Microphone charging time: 1-2 hours 9. Product material: Wooden box + ABS plastic