Size 166*55*34.2mm, Power 5W, Brand SHOWSEE, Model F305-GY, Battery Capacity 800mAh, Weight 162g, Executive Standard GB4706.1-2005 / GB4706.9-2008, Color Grey, Voltage 5V, Electric Current 1A.
Price history, coupons and price alert are available on this page. Best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
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Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($31.99): BGXPHD2
2. ($33.99): BGXPDE271
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGNOXP152, BGHealth06, BGGRNO153, BGHUN0151, BGHWSH6, 00c906
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Price history (for all/most countries) for SHOWSEE F305-GY Electric Shaver is here. The lowest price was: $31.99.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).