Brand Name: MILUDI 

Vocalism Principle: Orthodynamic 

Control Button: Yes 

Active Noise-Cancellation: Yes 

Communication: Wireless 

Volume Control: Yes 

Sensitivity: 120dB 

Wireless Type: Bluetooth 

Is wireless: Yes 

Function: For Internet Bar 

Function: for Video Game 

Function: Common Headphone 

Function: For Mobile Phone 

Function: HiFi Headphone 

Function: Sport 

Number Of Drivers: 2 

Plug Type: Line Type 

Package List: User Manual 

Package List: Charging case 

Package List: Charging Cable 

Connectors: USB 

Model Number: L21 TWS 

Bluetooth Version: 5.0 

Codecs: AAC 

Resistance: 32Ω 

Frequency Response Range: 20 - 20000Hz 

With Microphone: Yes 

Features: waterproof 

Charging Method: Charging case 

Bare metal specifications: 2 * 1.6 * 1.4cm 

Bare metal belt weight: 35.2g 

Communication distance: more than 10 meters 

Talk time: 4 hours 

Standby time: 120 hours 

Music time: 4 hours 

Battery type: lithium polymer battery 

Support agreement: HEP \ HSP \ A2D \ AVRCP 

Battery Capacity: 55AM (Capacity of Polymer Battery: 320AM) 

Speaker material: copper ring 8mm 

Process material: ABS + plating + food silicone ear caps 

Bluetooth version: V5.0 + EDR