Go down and check coupons out. Remember to check price history if it is available. What is best price?
Battery bin size: 64.5 *57 *27mm, Packing Number: Small 8 pcs, Frequency response: 20-20KHz, 3mW×2, SNR: > 98 dB, Headphone battery capacity: 50mAh*2/3.7V (polymer lithium battery), Charging bin capacity: 500mAh, Bare machine weight: 53g, Horn specifications: φ8mm, Play time: 2.5 hours, 32Ω, Large 96 PCs, Box Specification: 300*135*240mm, Charging time: 2 hours for headphones; 2.5-3.5 hours for charging bins, Distortion: <3%, 3.7V, Standby time: 50H charging voltage: 5V-1A, Gross weight: 109 G, Product size: 46.4x 18.5x 19.5 mm
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. I’m afraid that there’s no working coupon in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): 20JR, 502C6B, TTxBG10, 2019SPEDM, AFfbG10, BGTWS20, BG9b29a5
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Here is price history (for all/most countries) for JOYROOM T04 TWS Earphones.
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)).