NILLKIN NK-X1 5200mAh IPX4 Waterproof Bluetooth 4.0 Power Bank Charger Speaker For iPhone Sumsang HUAWEI XIAOMI etc.  10 years Anniversary Price:  $32.99 Normal Price:  $42.99 Date: 26th August -10th Steptember  What will you get from NILLKIN NK-X1 Speaker? Geometric modeling\/Silicone protection\/ Portable hook\/ Independent cavity design、 Dual speaker single vibrating diaphragm\/CSR Bluetooth 4.0、 Portable charger\/ Answer calls\/IPX4 waterproof\/ Up to 10h of music play  Please hurry up !!            Specifications:          General Specification            Brand       NILLKIN            Model       X-HS NK-X1            Color       Black、Green            Power interface       USB Micro             Voltage Output       4.75V-5.25V\/1A            Product Weight (g)       518.2g            Dimensions (mm\/ inch)       170*98*40mm           Technical Parameters            Battery       3.7V  5200mA\/h  (18650*2)            Audio Format       WAV  APE  FLAC (Also support MP3、WMA)           Output Power       5V\/1A           Buttons       ON\/OFF、 Answer\/Hang up、 VOL+\/PRE、 VOL-\/NEXT           Vibrating Diaphragm Size       50*90MM           Speaker Specification       45mm  4Ω3W           Frequency Response        90Hz-20KHz           Frequency Range       2.4~2.48GHz           Bluetooth Version       Bluetooth CSR 4.0           Transmission Range        About 10m           Functions        Bluetooth player、 Answer\/Hang up、 AUX audio input、 USB charging    Package  Included:                    1*AUX Audio Cable           1*USB Charging Cable           1*Portable Hook           1*User's Manual