Anti-lost devics for baby, pet, mobile, package etc Environmental protection function: No-radiation Features: Free regulation and control within 0-25 meters for the guard against article Anti-lost function Environmental protection function: No-radiation Searching function Alarm with vibrating Small size and portable Easy to useSender Dimension Receiver Dimension24.5(H)*24.5(W)*7(D)mm 60(H)X36(W) ...