E25 Mystery Wireless 4.2 headset lightweight one ear earphone hands free 80mAh battery for 4 hours music playback and 170 hours standby two colors1. Headset material: ABS.2. Size: 63*14*22mm. Weight: 8g.3. Wireless version: 4.2, Wireless chip: WT.4. Battery capacity: 80mAh. Charging time: 2 hours.5. Music time: 4 hours. Standby time: 170 hours.6. Supported languages: Chinese and English.