| Specification of earbuds | Specification of charging box | Specification of all | Specification of packaging |
| Product model: M21 Material: cloth/leather+ABS Color: dark grey, dark blue/OEM IC/CPU: Rhoda AB1536U Bluetooth version: V5.0 (EDR) Rf range: 2.4ghz ISM(2402-2480mhz) Transmission radius: 15m Certificate:CE/RoHS Speaker impedance: 32R Frequency response range: 20-20khz Key type: touch Sensitivity: 102±3DB At 1000 Hz At 0.126 V Power: 5mW Max Distortion: <0.1% Lasting music: about 4.5h Headphone battery capacity: 35mA | Storage battery capacity: 3300mA Storage charging port: Type-C Discharge port:USB-A Charging current: DC 5v-1A Charging duration: about 3 h Wireless charging duration: about 6 h Standby time: >200H | Weight of charging box:95g ears weight:8g Machine weight:103g Color box size:100*100*35mm Individual weight:176g | Contains:USB cable, use manual Inner box quantity:100PCS Box feet:375*320*220mm Net weight of box:17600g Gross weight of box:800g |
