CTT31 CTT32 CTT33 Wireless Call Button Transmitter:
Dimension:60*55 *21 mm
Power :1*12V battery
Call distance :500 meters (open area)
Material :ABS plastic
Color: White or black
1 key :call; 2 key: call , cancel; 3 key: call, bill, cancel
Button Sticker: with customization
Contact:Booker
Mobile:+8613366999382
Tel:WhatsApp: 8617316276580
E-mail:sales@catel.cn
Address:No.36 Xiejia Industry Park, Changping district, Beijing, China