Well, this tiny little device is incredibly cheap and awesome to use (it reads any sd card). The battery lasts more than your ears and I use it always when I'm training. You won't never notice its weight because it is extra-lightweight, probably the same weight of any earphones attached. So, good design, good battery life and extra-lightweight.
Main Features: - Support multiple MP3 music formats, can be used for a card reader - USB 2.0 interface, plug and play, convenient to use - Built-in Li-ion battery, ultra-long standby time, directly connect with PC for recharging via USB port - Directly upload or download the MP3 files into Micro SD / TF card ( up to 8GB, not included ) - Accurate sound quality, beautiful tone, nice appearance and smooth performance - Storage medium, anti-vibration and anti-interference - Multiple colors for your selection, a perfect gift for friends - Battery capacity: 70mAh - Charging time: 30 minute - Using time and standby time: 1 - 3H
Dimensions and Weight
Product weight: 0.030 kg Package weight: 0.052 kg Product Size(L x W x H): 5.00 x 4.00 x 1.50 cm / 1.97 x 1.57 x 0.59 inches Package Size(L x W x H): 5.50 x 5.50 x 5.50 cm / 2.17 x 2.17 x 2.17 inches