TETC Bluetooth 4.0 Smart Wrist Watch Health Bracelet Sports & Sleep Tracking Fitness-Green TETC Brand, Only authorized dealer can sell on this product.Don't buy bad quality fakes from unauthorized sellers. If you have brought fakes from other sellers please make A-Z dispute with them and get your money back ASAP. fake products aways broken in short time and no warranty ! Material: ABS plastic, TPU rubber and alloy. Wristband longest :24cm. Wristband shortest:15cm. For android system requires Android 4.3 or later, the device supports Bluetooth 4.0. Compatibility for:Android 4.3 and its upper; IOS7.0 and its upper.Battery power 80mah. Standby time 32 hours. Brand & model: For FIT BIT. Bluetooth version: Bluetooth 4.0. Screen Type 0.91"OLED.