JT-203Q Wireless Meal Picker Restaurant Loud Volume Caller, US Plug Filter-10 - 11 inch Speaker ringer buzzer for MacBook

Speaker ringer buzzer for MacBook Pro 13 inch Retina A1502 Late 2013 Early 2014 2015 923-0557 923-00509

and the other for microphone jack on PC/laptop/mobile phone

Characteristic Impendance: 100+/-20 Ohm

9 inch (2015) A1584 A1652

you can use it to detect it

JT-203Q Wireless Meal Picker Restaurant Loud Volume Caller, US Plug Filter-10 - 11 inch Speaker ringer buzzer for MacBook1. Simple operation, easy to use 2. Double speakers with high volume, light structure, loud sound and stable signal 3. It can be wall mounted or stand on the desktop bar 4. Exquisite appearance 5. Material: aluminum alloy, ABS 6. Power supply voltage: AC110V 5V USB3. 1 (Type C) 7. Modulation method: AM (433MHz) 8. Speaker: 3 inch 3 Euro 5Wx2 9. Screen display: 3 inch digital tube 10. Size: about 42. 8x11x3cm Specification: Package Weight One Package