Overview: Batteries:1 rechargeable Peel 520 battery (3.7V, 1200m A) Apple Peel 520 is a type of communication module back on the module, the SIM card slot, still have batteries & related components Made from soft material with the antenna locate at iPod Touch earphone jack 3G voice, microphone & speaker integrated Message: SMSGPRS function Work with all generations of iPod Touch (including iPod Touch 4). Important note: the iPod Touch must Jailbreak Specification:14.5cm*7.7cm*3cm 0.1144kg