F5: With detachable cable design, MMCX connector, Hi-Res Audio and MFi Certified, 1 3.5mm single-ended audio cable with in-line remote and 1 2.5mm balanced cable, the FiiO Aerospace titanium diaphragm in-ear monitors F5 is sold for only 64.99USD on Amazon. F9: With 1 Dynamic Driver & 2 Balanced Armatures, detachable cable design, Hi-Res Audio certified, over-the-ear design, Black&Red color, the FiiO Triple driver hybrid in-ear monitors F9 is sold for only 99.99USD in US. From now on, wherever you buy the F5/F9, you could win a AliExpress coupon which worths 15USD as long as you post review about F5/F9 on Facebook, Amazon or Head-Fi. Requirements: 1. Share your review/using experience of F5 or F9 on: Facebook, Amazon or Head-Fi. 2. Contents: image and text review or simply text review will do(more than 60 words). All we need is your objective review, so you don't need to overstate your experience in the review. 3. Email the review link and purchase invoice/record to firstname.lastname@example.org. 4. Time：from the day this activity is post to our further notice Notes: 1. Applicable to users in all regions except for China. 2. We will email you the coupon after our review. The coupon will be applicable to purchase in our store on Aliexpress：https://fiio.aliexpress.com/store/1473108… 3.The coupon(15USD off when purchase up to 100USD) would be valid for a month after you receive the coupon email from us. 4. FiiO Electronics Technology Co., Ltd. reserves all rights to interpret and amend the rules of this activity as necessary.