Question: what musical percussion family instrument called zils was used with singing slogans?

Context paragraphs:
Xylophone: The xylophone (from the Greek words ξύλον —"xylon", "wood" + φωνή —"phōnē", "sound, voice", meaning "wooden sound") is a musical instrument in the percussion family that consists of wooden bars struck by mallets. Each bar is an idiophone tuned to a pitch of a musical scale, whether pentatonic or heptatonic in the case of many African and Asian instruments, diatonic in many western children's instruments, or chromatic for orchestral use.

Tambourine: The tambourine is a musical instrument in the percussion family consisting of a frame, often of wood or plastic, with pairs of small metal jingles, called "zils".  Classically the term tambourine denotes an instrument with a drumhead, though some variants may not have a head at all.  Tambourines are often used with regular percussion sets.  They can be mounted, for example on a stand as part of a drum kit (and played with drum sticks), or they can be held in the hands and played by tapping or hitting the instrument.

Pate (instrument): The Pātē is a percussion instrument of Cook Islands Māori origin, named after the Māori word for "beat" or "pulse".  It is of the slit drum family, and therefore is also of the idiophone percussion family.  It is made from a hollowed-out log, usually of Miro wood and produces a distinctive and loud sound.  Different sizes of pate offer different pitches and volumes, as well as striking the pate in the middle or near the ends.

Song bells: Song bells are a musical instrument in the percussion family; they are a mallet percussion instrument that is essentially a cross between the vibraphone and the glockenspiel.  They sound one octave down from the glockenspiel (so one octave above written pitch).  Song bells have been made by various makers at different times but were first introduced by the J.C. Deagan Company in 1918 and were manufactured until 1924.

Gong: A gong (from Javanese, Indonesian, Malay: "gong"; ; Thai: ฆ้อง "Khong"; Vietnamese: "cồng chiêng" ) is an East and Southeast Asian musical percussion instrument that takes the form of a flat, circular metal disc which is hit with a mallet.

Obrom: An obrom is a type of musical instrument in the percussion family, originating in Nigeria.  Formed from one large piece of wood, often a log of paduc, the obrom has two recesses connected to each other by a small channel.  This is why it is sometimes referred to as a slit dum.  The obrom, when struck with mallets near the recesses, plays two to four tones; these are generally alternated in a repetitive beat, or played in an ostinato.  It was used as an instrument for communication, transferring messages in a way similar to morse code.

Ranat ek: The ranat ek (Thai: ระนาดเอก ,  ] , "alto xylophone") is a Thai musical instrument in the percussion family that consists of 21 wooden bars suspended by cords over a boat-shaped trough resonator and struck by two mallets.  It is used as a leading instrument in the piphat ensemble.

Percussion instrument: A percussion instrument is a musical instrument that is sounded by being struck or scraped by a beater (including attached or enclosed beaters or rattles); struck, scraped or rubbed by hand; or struck against another similar instrument.  The percussion family is believed to include the oldest musical instruments, following the human voice.

Khanjani: Khanjani is a percussion musical percussion instrument, a variety of Daf, found in West Bengal & Odisha.  After the hard work in the field all farmers and villagers gather in a small club (which is called "tungi" ) at evening and sing songs and use this musical instrument which is call Khanjani.  This is usually created from the sell of the Snake, Cow and Crocodiles.

Students For Society: The Students For Society (SFS) was founded in Panjab University, Chandigarh on September 2010 as a students' discussion group for holding discussions on books and social issues.  It rejected the politics of muscle and money power by mainstream political parties in University.  It also rejected the politics of those who were trying to get votes by offering movie shows, dinners, trips and beauty parlour coupons.  SFS takes out its rallies on foot with singing of slogans with a Tambourine ("Dafli") while other parties took out rallies in cars.  Its rallies are joined by a considerable number of campus students while the SOI, PUSU and NSUI alliances had to call outsiders in violation of the Lyngdoh panel norms.

Supporting paragraphs: Students For Society Tambourine
Answer: Tambourine