how effective is birth control

{"cid":"91159363","title":"Effective hospital use 220V 50Hz \/ 110V 60Hz q switched nd yag laser tattoo removal pigmentation removal machine","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/3a\/1d\/cc497458434b872b6fe73744b8fc-200x200-1.jpg","attrs":{"Price":"$6999-$13000","Brand Name":"Beijing Forimi S&T Co.,Ltd","Model Number":"FMY-1","Minimum Order Quantity":"1 set","Delivery Time":"Within 5 Working Days After Payment","Place of Origin":"Beijing China","Certification":"CE, EMC, FDA, ISO","Packaging Details":"Aluminum Alloy Case or Wooden Case","Payment Terms":"Bank Transfer, Western Union, Paypal...","Supply Ability":"200 Sets \/ Month","Energy of single pulse":"250mj-1500mj","Unstable output range":"ST\u2264\u00b110%","Output repeat":"Rj<10%","Error of expected energy and practical energy":"\u2264\u00b120%","Spot diameter":"1-4mm adjustable","Voltage":"220V 50Hz \/ 110V 60Hz"}}

{"cid":"91159441","title":"Most Professional!! Q Switched Nd Yag Laser Tattoo Removal Skin Disease Treatment","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/88\/e3\/e4d1e8e4c02b8d62d163dc6e7f44-200x200-1.jpg","attrs":{"Brand Name":"NUBWAY","Model Number":"NBW-2000B","Minimum Order Quantity":"1 set","Delivery Time":"3-5 working days","Place of Origin":"Beijing (China)","Certification":"CE","Packaging Details":"Aluminum Package","Payment Terms":"T\/T; West Union","Supply Ability":"300sets\/month"}}