wireless chargerSpecifications: Color: black and silver Charging positions: three devices at the same time Adapter power: 15W Input voltage: 18V DC Standby current: 0.012A Pad weight: 333g Pad dimensions: 28.1 * 15 * 1.5cm For Apple's iPhone 3G/3G's receiver weight: 32g For Apple's iPhone 3G/3G's receiver dimensions: 12.7 * 6.4 * 1.5cm For Apple's iPhone 4G/4G's receiver weight: 32g For Apple's iPhone 4G/4G's receiver dimensions: 12.7 * 6.4 * 1.5cm Universal receiver weight: 31g Universal receiver dimensions: 6.4 *6.4 * 1cm This power pad can charge up to 3 devices simultaneity.The most advanced wireless charger solution Good replacement for other charger The solution for Apple's iPhone 3G/4, is a receiver case which looks like normal case that can protect your Apple's iPhone and charge it wirelessly Our solution is using universal receiver, which is suitable for devices like Sony's PlayStation Portable, Nintendo's DS, Nokia, Samsung, Apple's iPad/iPod, and more Time of the wireless charger set:1 Year.