MH3 Wireless 2-in-1 Headphone with Speaker FunctionSpecifications: With Microphone: Yes Wireless Type: bluetooth Waterproof: No Volume Control: Yes Vocalism Principle: Dynamic Support Memory Card: Yes Style: Headphone Number Of Drivers: 2 Model: MH3 Headphone Pads Material: Memory Foam Driver Diameter: 40mm Control Button: Yes Communication: wireless Charging Method: Batteries Certification: CE Bluetooth Version: 5. 0 Output Power: 3W * 2 Speaker: 40, 4 3W Battery Capacity: 450mAh Input Power: DC5V