Liotin Call Chime Buzzer Set of 5, includes 2 wireless call buttons and 3 receiver units for home use. - Brand: Liotin - Quantity: Set of 5 - Type: Portable Buzzer - Battery Type: Button battery only The call switch in the third photo is not responding, possibly due to a dead battery or malfunction. Please consider it as a bonus. The other two switches that can be worn around the neck worked. Thank you for viewing.