Mpow Shark Bluetooth 4.0 Wireless Headset Headphone Earpiece with High Connection Quality and Intelligent signal Performance Mpow Shark Bluetooth 4.0 Wireless Headset Headphone Earpiece with High Connection Quality and Intelligent signal Performance. High Connection Quality. Advanced technology providing you a high connection quality when you are having a business call or a lovely family chat. Ultra-long talking/playing time: up to 5 hours on a single charge. Intelligent signal Performance. Support Siri voice command. Integrated multi-point technology lets you connect two devices at once, so you can seamlessly switch between your business and personal phones.