Features: Protection frame structure Cushioning rubber + Special resin Protection frame structure Bluetooth wireless technology The radio is designed to connect with a device featuring Bluetooth wireless technology such as a smartphone, and play audio through its speakers. Audio playback & recharge function Music play & charge function Equipped with an AUx input terminal and an USB charging jack, the protection storage case stores a smartphone or a portable music player, while the user listening to internet radios Degree of protection against ingress of water IPx4 water resistance Water protection class Designed to withstand up to 5 minutes exposure to rain. This product is designed to be resistant to water. However, it is not guaranteed that the product will not fail. Also designed to be operated by household power supply with the included AC adaptor. Specifications: AM frequency 522 - 1629 KHz FM frequency 87.5 - 108 MHz Speaker 90mm (8Ω) 7W x 2 Length 405 mm Width 312 mm Height 265 mm Weight 4.0 kg