This tuner allows you to watch One-Seg broadcasts on your iPhone or iPad, and can be used for approximately 4 hours on its built-in battery. I opened it to check its condition, but it is unused. - Brand: STAYER - Product Name: 1 seg tuner - Compatible Devices: iPhone, iPad, iPod touch - Functions: One-Seg reception, time-shift recording - Battery: Built-in battery, approximately 4 hours - Connection: App connector Thank you for viewing.