Q&Q radio-solar powered wristwatch. It started working and received radio signals after being exposed to sunlight for about a day. It continues to work even after being left in the dark overnight, but the battery life is unknown. The wrist size can be adjusted with one touch, accommodating up to approximately 20mm. Digital display radio-controlled wristwatch with a stainless steel band. - Water resistance: WATER RESISTANT - Band material: Stainless steel - Display type: Digital - Light function: Backlight Please examine the photos carefully before considering a purchase. This item is sold as is. This is an antique/vintage item. Future operation is not guaranteed. Please consider this as a junk item. There are minor scratches and signs of wear. Please check the accessories in the images. Regarding returns and exchanges: Thank you for your patronage. We are very sorry, but we do not accept returns or exchanges for purchased items. Thank you for viewing. Search words: Quartz, stylish, antique, vintage, North American style, gold wristwatch, leather strap, rubber strap, contemporary art, vintage, retro, stainless steel, divers watch, study, exam, outdoor, camping, simple, chic, formal events, entrance ceremony, graduation ceremony, dress, chronograph, men's, women's, wristwatch, Showa retro, Heisei retro, art, design, art, fashion, Taisho modern, tank, square type Thank you for viewing.