Key Specifications Brand: SING‑E Model: ZQS‑818 Product Name: Portable Bluetooth Speaker Bluetooth: v5.0 Output Power: 10–30W Driver Size: 3" Frequency Range: 80Hz–20KHz Battery: 2000–3000 mAh (3–5h charging, 5–10h use) Power Source: USB Power Lighting: RGB LED Memory Card Support: Yes Microphone Support: No Built‑in Microphone: No Material: Plastic Use: Mobile Phone, Computer, Karaoke, Outdoor, Party, Home Theatre Functions: BT / USB / TF / FM / TWS Certification: CE / ROHS / ISO9001:2008