waterproof singcall bracelet reciver ( with shack function)

product size: 48 x 25 x25mm, 

with UV painting, black color

Screen: OLED screen, 

with 2 buttons,

display type: 1 group 3/5 digits

input power: 100-240V AC, 50/60 Hz, 

output power: DC 5V/0.1A, 

Lithium battery 3.7V,

 battery  capacity: 180MAh

note time: 01-15 group times

receiving sensitivity: -114dbm, 

working frequency: 433.92Mhz, 

Strong EMC anti-interference, 

support 500pcs of calling senders

standby time: 2-3 days

working distance: within 120m