1. Single track and low-frequency boost 2. Button 3. Built-in 550mAh lion battery 4. 50mm loudspeaker and built-in radiator to enhance the bass 5. Output 4Ω3W 6. Frequency response 30Hz-20KHz 7. Bluetooth 2.1+EDR 8. Degree of distortion: <1% 9. SNR: >90DB 10. Product size: L78*W78*H38 11. Supports: APE/FLAC/WAV lossless music format 12. Two-way hands-free calls Packing Gift card box or simple white box Custom design box as per order demands Export packing: pp bag-unit box-inner carton-export carton Delivery Shipping methods: DHL, UPS, FedEx Delivery lead time: 7-10 days after payment confirmed