1. Single track and low-frequency boost 2. Button 3. Built-in 1500mAh lion battery 4. 2-inch loudspeaker and 2-inch low-frequency radiating element 5. Output: 4Ω 5W 6. Frequency response: 20Hz-20kHz 7. Bluetooth 2.1 8. Degree of distortion: <1% 9. SNR: >90dB 10. Two-way handsfree 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 details: Shipping methods: DHL, UPS, FedEx Delivery lead time: 7-10 days after payment confirmed