Bluetooth Bluetooth 4.0 (CSR8635A04U) Wireless range 360, <10m Impedance 32 Playing time Up to 8 hours Input DC 5V/500mA, Mini USB Charging time 1 hour LED indicator Low power: Red (flashing) Charging: Red (solid), Power full: Blue (solid) Pairing: Blue Red (flashing) Bluetooth connected: Blue (slow flash) Bluetooth unpaired: Blue (rapid flash) Others Profile: A2DP, AVRCP, HSP, HFP Frequency: 2402MHz-2480MHz Speaker driver: 40mm Frequency response: 20Hz20KHz Sound press level: 110dB3dB Microphone: 4.01.5mm, -423dB Power Source: 250mAh/3.7V (Li-polymer) Battery dimension: 30303mm Weight 0.50 Item Dimension 9 x 7.1 x 1.6 Warranty Information 1 Year