Dear customer, hello. we have two types, type A is suitable for battery box heating (the battery box needs to be equipped with 3 AA batteries, not included), type B is heated with 2000 mAh lithium battery (including battery).Please choose carefully to avoid mistakes. Type A Product Features: 1. Product Name: Hand Warmer Rechargeable Heated Fingers Safe Constant Temperature Heated Warm Gloves For Men Women 2. Material: nylon + cotton (gloves) 3. Use 3 PCS AA batteries for heating (not included) 4. Feature: water-repellent and breathable fabric, powered by the lithium battery, warm & non-slip 5. Heated area: fingers 7. Warming time: about 4 hours constant temperature warming (depending on the ambient temperature environment) 8. Size: (approx.) 1) M: width: 11.5 cm/4.53 in ; length: 28.5 cm/11.22 in; middle finger to the wrist: 18 cm/7.09 in 2) L: width: 12.5 cm/4.8 in ; length: 30 cm/11.62 in; middle finger to the wrist: 18-21 cm/7.09-8.27 in 9.Kind Reminder: Please charge the gloves with the included standard charger. Don't use the other charger t o charge the gloves. Packing list: 2* glove 2 * Battery case(Connected, does not contain AA batteries) 1 * manual Type B Product Features: 1. Product Name: USB Hand Warmer Rechargeable Heated Fingers Safe Constant Temperature Heated Warm Gloves For Men Women 2. Material: nylon + cotton (gloves) 3. Battery material: polymer lithium battery (small volume, safe and explosion-proof) 4. Feature: water-repellent and breathable fabric, powered by the lithium battery, warm & non-slip 5. Heated area: fingers 6. Battery configuration: 2 PCS 3.7V / 2000MAH lithium battery (including batteries) 7. Warming time: about 4 hours constant temperature warming (depending on the ambient temperature environment) 8. Size: (approx.) 1) M: width: 11.5 cm/4.53 in ; length: 28.5 cm/11.22 in; middle finger to the wrist: 18 cm/7.09 in 2) L: width: 12.5 cm/4.8 in ; length: 30 cm/11.62 in; middle finger to the wrist: 18-21 cm/7.09-8.27 in 9.Kind Reminder: Please charge the gloves with the included standard charger. Don't use the other charger t o charge the gloves. Packing list: 2* glove 2 * 2000MAH Li-battery 1 * USB charging cable 1 * manual