Please pay attention to this note: 1. Please charge after receive jump . 2. Charge every 3 months, low power may fail start. 3. Charge phone tablet only occasionally. efficiency is about 50%. 4. The charge speed or discharge speed be fast during the last 15% power of the jump . Please do not worry about these problems. This is the characteristic of high-rate lithium batteries, and it not affect product quality and normal use. Why it's necessary to get a jump ? 1. Long standby time run out battery; 2. Make preparation for a long driving trip; 3. Your car can't start due to low power or freezing winter; 4 in 1 Car Starting Device-- Do more with Less Money. 1. Jump . 2.150PSI Air Compressor. 3. Power Bank. 4. LED Flashlight Name: Car ; Suitable model: small car Product series: Auto pump start power supply Display mode: intelligent digital display Special Features:USB,Lighting,warning light,SOS Lighting Conversion Rate:80%~85% Battery Capacity(mAh):39800 Matters needing attention ( must see) The product has just been received, you must first turn on the flashlight to discharge, and then charge the product for more than 4 hours, and then start the car, because the product is empty. This operation can prolong the service life of the product! Do not discharge and charge at the same time. This product is a pure battery product. Colour: Black+Red Material: ABS Dimensions: 23x13x5CM Voltage:12V Package Contents: 1 x 1 clip 1 x steam pipe 3 x steam nozzles 1 x usb cable Only the above package content, other products are not included. Note: Light reflection 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.