Specifications: Rechargeable battery, <60 luminous flux, 5V voltage, plastic body material, lithium metal battery, novelty style, LED bulbs, batteries included. Place order by choosing size and color, then sending photo and text in chat. Both sides of lamp can be printed with photo and text. Production time is 2-4 working days so plan accordingly. For best results, use a clear, half-length photo with a clear face. Contact us directly for assistance with choosing a photo. If no custom message is sent, a heart light will be sent instead. Use by touching metal ring to turn on/off and change color, long press to adjust brightness, and insert DC connector to charge. Note: light may not respond if hands are too dry or temperature is too low. Charge for 1-2 hours if light is not turning on.