Super Value Combo: Models F1 + X2 Earbuds (Save $54.99 over individual price) Z05 The battery has 7-10 days

The battery has 7-10 days of backup use

Accurate and detailed sleep and nap tracking helps you manage your sleep patterns and improve your overall health

Supports over 100 exercise modes

Secure and Comfort Wearing

Super Value Combo: Models F1 + X2 Earbuds (Save $54.99 over individual price) Z05 The battery has 7-10 daysThis bundle includes: 1 Tranya F1 (Powerful Bass Wireless Charging LED Power Display) and 1 Tranya X2 Earbuds (with 4 Microphone Incredible Sound Quality and IPX5 Waterproofing). For just $5 more than the price of the F1 alone, you can own both of these premium products. Its an unbeatable deal with incredible value!