set2: 1 x AC charger + 1 x Battery HolderProduct Name: Battery HolderThe AC adapter easily folds out to charge and pack away.Smart charger can charge two at a time.Suitable for 10440 14500 16340 16650 14650 18350 18500 18650.Universal Micro-USB port / suitable charging current (1A / 2A).These user-friendly designs give convenience especially for traveling.DC 5V input safety voltage / reverse-polarity and short circuit protectionCarcase size: 7.5 x 6 x 2 cm / 7.62 cm x 6.1 cm x 1.98 cm (L x W x H)Cable length (each): 15 cm / 14.99 cmBattery type: 3 x 18650 3.7 V batteryfireproof shell / perfect heat dissipation / high temperature resistance.Makes the MC1 Plus the safest charger and ensures your safety.Cut off the voltage at 4.20V / TC-CC-CV charging method / Soft start.Avoids sudden high current impact and maximizes batteries' lifespan.Fulfills emergent use with 3 hrs charging time. Besides, the battery rescue function maximizes batteries' lifespan.Product model: BH-042100-04UFeatures: 4 slots independent chargingPower supply mode: regular USB power supplyInput voltage: DC 5V 1-2AOutput voltage: DC 4.2V 1000mAProduct size: about 90 x 30 x 122mm/2.7 x 0.9 x 3.66inThis is a USB connector, not plugcolour:blackMaterial: plastic, metal/plasticPackage Contents:1 x AC charger1 x Battery HolderOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.