Product Features: 1.Long standby time 2.Safe charging 3.Digital chip 4.Intelligent noise reduction 5.Anti-howling Specifications: Product parameters: 1. Material: medical - grade TPE environmentally friendly materials 2. Weight: about 10g 3. Current consumption: 1.2mA 4. Working time after being fully charged: about 40H Package Included: Principal machine * 1 Earplugs * 4 Cleaning sweeper * 1 Charger * 1 Notes: 1-2cm error might exist due to manual measurements, please kindly understand. The colors deviation might differ due to different monitor settings. We provide you with the best product and service. If you have any problem, please let us know, and we will solve the problem ASAP. Thank you so much.