Note: This is an assembling kit of earphone amplifier power bank, NOT a finishes one, you need to install it by yourself. This power band must work with 606070 polymer battery, battery is not included. Description: This is a DIY kit of large capacity mobile power bank with earphone amplifier function. 6400mAh large capacity allows for fast and safe charging. It adopted classic power amplifier chip for timbre processing, provides good dynamic and supports most of head-mounted dynamic headphones. A perfect choice for music enthusiasts. Features: HIFI Stereo Earphones Amplifier: 180mW audio output efficiently advances audio quality, pure bass, dynamic enhancing, and high frequency extension, provides you an excellent enjoyment in music. Support most of HIFI high power head-mounted headphones. Ultra-long lasting time, advanced power supply and consumption management allows it to play music for up to 640 hours. 5000-6400mAh portable power bank, support fast charging, suitable for sport, travel, and other outdoor activities, you can easily charger for your mobile phone anytime and anywhere. Safe for charging fully protect your phone from overcharge, over-temperature, overpressure, overload, and short circuit. Built-in MUC dedicated processing chip for safe and high-efficiency charging. Black and white abstract painting cover, full of creation and artistic. Specifications: Model: PA02 Color: Black and White Power Supply: 5V 2A Power Capacity: 5000-6400mAh Charging Current: 1000-2000mA Battery: 606070 Polymer Battery (NOT Included.) Working Temperature: 0 ~ 50 ° C Storage Temperature: -40 ~ 70 ° C Storage Humidity: 10 ~ 90% Package Size: Approx. 13 * 7.5 *2.5cm Weight: 39g Package Weight: 43g Package List: 1 * Earphone Amplifier Power Bank Case Kit 1、HIFI Stereo Earphones Amplifier: 180mW audio output efficiently advances audio quality, pure bass, dynamic enhancing, and high frequency extension, provides you an excellent enjoyment in music. 2、Support most of HIFI high power head-mounted headphones. 3、Ultra-long lasting time, advanced power supply and consumption management allows it to play music for up to 640 hours. 4、5000-6400mAh portable power bank, support fast charging, suitable for sport, travel, and other outdoor activities, you can easily charger for your mobile phone anytime and anywhere. 5、Safe for charging fully protect your phone from overcharge, over-temperature, overpressure, overload, and short circuit.