Features 1. 400mAh large-capacity charging compartment, which can last for 150 hours of standby time. 2. Using CNVC noise reduction technology, set 5, sound absorption and sound insulation in one, reduce external noise. 3. Widely compatible with mobile phones, tablets, notebooks and other digital devices with Bluetooth. 4. The call is stable and the sound transmission is clear. Specifications: Material:ABS Size:9 x 9 x 4cm Color:White,Gray Package Included: 1x Headphone Compartment 2x Headphones 3 Pairs Of Ear Hats 1x Charging Cable